When the National Security Agency’s invincible code-breaking machine encounters a mysterious code it cannot break, the agency calls its head cryptographer, Susan Fletcher, a brilliant, beautiful mathematician. What she uncovers sends shock waves through the corridors of power. The NSA is being held hostage…not by guns or bombs but by a code so complex that if released would cripple U.S. intelligence. Caught in an accelerating tempest of secrecy and lies, Fletcher battles to save the agency she believes in.

Particle physicist Jon Grady is ecstatic when his team achieves what they've been working toward for years: A device that can reflect gravity. Their research will revolutionize the field of physics - the crowning achievement of a career. Grady expects widespread acclaim for his entire team. The Nobel Prize. Instead, his lab is locked down by a shadowy organization whose mission is to prevent at all costs the social upheaval sudden technological advances bring.

At 12, Gideon Crew witnessed his father, a world-class mathematician, accused of treason and gunned down. At 24, summoned to his dying mother's bedside, Gideon learned the truth: His father was framed and deliberately slaughtered. With her last breath, she begged her son to avenge him. Now, with a new purpose in his life, Gideon crafts a one-time mission of vengeance, aimed at the perpetrator of his father's destruction. His plan is meticulous, spectacular, and successful.But from the shadows, someone is watching. A very powerful someone, who is impressed by Gideon's special skills.

Earth's century of peace as a colony of an alien race has been shattered. As the alien-run government navigates peace talks with the human terrorist group Sapience, Donovan tries to put his life back together and return to his duty as a member of the security forces. But a new order comes from the alien home planet: withdraw. Earth has proven too costly and unstable to maintain as a colony, so the aliens, along with a small selection of humans, begin to make plans to leave. Suddenly Earth becomes vulnerable to a takeover from other alien races....

The witnesses are legion, scattered across the world and dotted through history, people who looked up and saw something impossible lighting up the night sky. What those objects were, where they came from, and who - or what - might be inside them is the subject of fierce debate and equally fierce mockery, so that most who glimpsed them came to wish they hadn't. Most, but not everyone.

At 33, Ryan Kealey has achieved more in his military and CIA career than most men can dream of in a lifetime. He's also seen the worst life has to offer and is lucky to have survived it. But being left alone with his demons is no longer an option. The CIA needs him badly, because the enemy they're facing is former U.S. soldier Jason March. Ryan knows all about March - he trained him.

Astronomer and TV science guy Gevin Rees just landed the interview of a lifetime with the world's most famous physicist. Remarkable, because the eccentric genius is notoriously reclusive, and he's already dead. What happens next forces Rees to run for his life from not one but two deadly assassins and global powers desperate to bury what he's just uncovered. Mind-blowing technology and solid evidence that would rewrite religious history and challenge the faith of billions.

Robert Tracy is spirited away from his own execution. A top-secret government project makes him an offer he can't refuse: work for us or disappear permanently. With no choice, he embarks on a mission to undo a terrorist attack that has already occurred, by being sent back in time 36 hours. But all is not as it seems. Soon, a conspiracy at the highest level of government to seize total power over the country threatens the second chance at life he has been given.

The fate of humanity lies on the shoulders of Burt Radcliffe, the new head of NASA's Near Earth Object program. He's been rushing the completion of DefenseNet, a ring of satellites that are both part of an early-warning system, as well as the means to eliminate incoming threats. Yet Burt knows that despite the world's best efforts, nothing can be done about the alert he's just received. Coming out of deep space is a danger that's been approaching since the dawn of time. A black hole. An unstoppable threat that promises death for all in its wake.

Simon Kovalic, top intelligence operative for the Commonwealth of Independent Systems, is on the front line of the burgeoning Cold War with the aggressive Illyrican Empire. He barely escapes his latest mission with a broken arm and vital intel that points to the empire cozying up to the Bayern Corporation: a planet-sized bank. There’s no time to waste, but with Kovalic out of action, his undercover team is handed over to his ex-wife, Lt. Commander Natalie Taylor.

The first three books in the riveting new thriller series from Wall Street Journal and USA Today best-selling author L.T. Ryan. The Blake Brier books are gripping thrillers loaded with twists, suspense, and nonstop action.

Circles is the most popular social network in the world: vast, ubiquitous, and constantly evolving. Days before expanding into China, Circles suffers a devastating cyberattack - and a key executive is brutally murdered. As he fights to save the company he helped build, top engineer Sergio Mansour uncovers evidence of a massive conspiracy that turns the power of Circles against its users. But as Sergio investigates, someone is watching his every move - someone ruthless enough to brand him a criminal and set a vicious hit man on his trail.

On a cold night in Australia, two construction workers driving along a deserted mountain road are gunned down inside their vehicle. The killings are fast. Efficient. An assassination carried out with expert precision. The only witness to the crime is a man resting by the side of the road. Recently retired, he'd flown halfway across the world to escape his demons. Ex-US black ops operative Jason King.

Thirty years ago, in a facility buried beneath a vast Wyoming emptiness, an experiment gone awry accidentally opened a door. It is the world’s best-kept secret—and its most terrifying. Trying to regain his life in the Alaskan wilds, ex-con/ex-cop Travis Chase stumbles upon an impossible scene: a crashed 747 passenger jet filled with the murdered dead, including the wife of the President of the United States.

In the mid-23rd century, Darwin, Australia, stands as the last human city on Earth. The world has succumbed to an alien plague, with most of the population transformed into mindless, savage creatures. The planet’s refugees flock to Darwin, where a space elevator—created by the architects of this apocalypse, the Builders—emits a plague-suppressing aura.

At 33, Ryan Kealey has achieved more in his military and CIA career than most men can dream of in a lifetime. He's also seen the worst life has to offer and is lucky to have survived it. But being left alone with his demons is no longer an option. The CIA needs him badly, because the enemy they're facing is former U.S. soldier Jason March. Ryan knows all about March - he trained him.

Russia, 1959. Nine members of a Soviet mountaineering team on an ambitious expedition into the Ural Mountains are found dead, victims of massive and bizarre injuries. The Dyatlov Pass incident, as this grisly event came to be known, remains unexplained to this day.

Thirty years ago, in a facility buried beneath a vast Wyoming emptiness, an experiment gone awry accidentally opened a door. It is the world’s best-kept secret—and its most terrifying. Trying to regain his life in the Alaskan wilds, ex-con/ex-cop Travis Chase stumbles upon an impossible scene: a crashed 747 passenger jet filled with the murdered dead, including the wife of the President of the United States.

From its first moments, Hunter takes you on a nonstop thrill ride: from the top floor of the CIA, to the marbled corridors of Capitol Hill...from the posh hotels of downtown Washington, to the city's mean, violent streets. It introduces a colorful new hero for our time - and a dazzling heroine every bit his equal. A spy mystery...a crime thriller...a passionate romance: Hunter is a genre-bending novel unlike any you've read. Deviously plotted, filled with vivid characters, and propelled at a breakneck pace.

Charles "Jay" Tice was a legend throughout the world of international intelligence. But secretly he was also a traitor, reputedly selling information that will seriously compromise the security of the United States for decades to come. Since his treachery was exposed, Tice has been kept under strict surveillance in a maximum security prison. Then one morning, his cell is discovered empty. Jay Tice has vanished - without tripping an alarm or leaving any trace of his passing.

A young wife disappears in the night, never to be seen again. There is no evidence of kidnapping - in fact, everything indicates that she left on purpose. Her husband, a brilliant police detective, cannot believe this - but he also can't find her. Flynn Carroll’s lost love becomes his obsession. He begins amassing a file of similar cases nationwide.

Just days before a massive exhibition opens at the popular New York Museum of Natural History, visitors are being savagely murdered in the museum's dark hallways and secret rooms. Autopsies indicate that the killer cannot be human.... But the museum's directors plan to go ahead with a big bash to celebrate the new exhibition, in spite of the murders.

If you've never read a Repairman Jack novel, this is the place to begin. It's 1990. A twenty-one-year-old named Jack has dropped out of college, leaving his old life behind to build a new one in New York City. Manhattan's rough edges are jagged enough to shred any unwary newcomer, but perhaps not one who is determined to stay off the grid, at any cost, in the busiest metropolis on earth. And to do so, he'll have to take jobs of a less than legal nature.

After losing her mother to a terrorist attack, Alexandra Poe was devastated when her father - disgraced and accused of treason - disappeared from the face of the earth. Now, over ten years and a stint in Iraq later, Alex is approached by a man who has information about her father and wants to help her find him. But there's a catch.

Daniel Ash wakes after midnight to the cry of his daughter. Just a bad dream, he thinks. She's had them before. Yet he can't help but worry when she cries out again as he pads down the hallway. Stepping through her doorway, he expects to find her sitting up in bed, frightened by a nightmare. But the nightmare is his. It's real. And it's just beginning....

All ATF Agent Jack Donovan wants out of life is to do his job and work on his strained relationship with his daughter Jessie after a nasty divorce. But in a ruthless act of revenge by a charismatic madman, Jessie is kidnapped and buried alive, with barely enough oxygen to sustain her. Now the only man who can save her, the only man who knows where to find her, has just been shot dead - and the clock is ticking... So what's a father to do?

Twenty-four hours. That's all it takes for the lives of two young people to be changed forever. Alex Chin has the world on a plate. A football hero and homecoming king with plenty of scholarship offers, his future looks bright. His tutor, Samantha Dixon, is preparing to graduate high school at the top of her class. She plans to turn her NASA internship into a career. When a football accident lands Alex in the hospital, his world is turned upside down.

When former government agent Frank Compton steps back into his apartment after his tangle with the Modhri - a coral-like group mind - he finds a young woman with his gun in her hands waiting for him. Her little sister's life is in danger and Compton is the only one who can help. After retrieving his gun and kicking her out, he finds himself falsely accused of her murder. With a little help, he posts bail, gets a new identity, and begins the search for the little girl.

A quantum physicist shocks the world with a startling experiment, igniting a struggle between science and theology, free will and fate, and antagonizing forces not known to exist. Eric Argus is a washout. His prodigious early work clouded his reputation and strained his sanity. But an old friend gives him another chance, an opportunity to step back into the light.

The Team: Financed by a billionaire philanthropist, this elite team - a soldier, an historian, a computer whiz, a weapons expert, and a thief - is tasked with finding the world's most legendary treasures. The Mission: Fearing a German victory in WWI, the Romanian government signed a deal with Russia to protect the country's treasures. In 1916, two trains full of gold and the most precious possessions of the Romanian state - paintings, jewelry, and ancient artifacts - were sent to the underground vaults of the Kremlin....