For five friends vacationing on Block Island, it was a summer to remember. How could they forget it when only four made it back to the mainland? Now, half a decade after Zoe Gilbert’s unsolved disappearance, Callie Sutter invites estranged friends Meg, Tess, and Lindsey—the last to see Zoe on that fateful trip—to reunite on the anniversary of the mystery that tore them apart. Back on Block Island, Callie reasons, they can come together again, memorialize Zoe, allay old resentments and recriminations, and put the past to rest. But it won’t be so easy.

In a tight-knit town in the 1980s, a child-killer is on the loose. And Topaz’s parents are on edge. At ten years old, Topaz is so vulnerable. But she has nothing to worry about. Her eldest sister, Ruby, has made sure of that. Swearing Topaz to secrecy, Ruby reveals she has trapped the monster in their root cellar.

Incredibly resilient and determined to rewrite the possibilities of life with a chronic illness, Penny is ready to leave her family behind and go to college by herself, accompanied by a snazzy new wheelchair and a backpack full of confidence. When she meets the charming actor CJ, who is studying the same course, there’s an immediate spark. But Penny worries that her life isn’t fast-paced enough for CJ and assumes they’re better off as friends.

Brynja spent her childhood as a captive performer in Tenebris, the imposing mountain palace of King Kallias. Every night she risked death for the king’s entertainment until his rebellious son, Prince Ballast, helped her escape. Now twenty, Brynja has never forgotten the brutal king. Or forgiven him. Under the cloak of a three-month-long Winter Dark, Brynja is returning to Tenebris for revenge.

1947: Adventurous Radcliffe graduate Catherine “Cat” Killeen cancels her wedding and upends a future that no longer suits her. At the behest of her professor and hungry for a challenge, Cat arrives in Virginia to work on a confidential military project. A student in cryptoanalysis, Cat is already ahead of the game—to assist in rooting out Soviet spies who have infiltrated the US. Joining the “government girls” of Arlington Hall, Cat gains the respect of her superiors and the friendship of her peers. Then, on a night out in DC, Cat runs into Jonathan Dardis.