The search for justice for this one man's death—his body found in broad daylight, with tape over his eyes, an undisguised hit—would deliver more than the truth. It exposed his status as an informant and led to protests, campaigns, far-reaching changes to British law, a historic ruling from a senior judicial body, a ground-breaking police investigation, and bitter condemnation from a US Congressional commission.

This new biography of Van Buren—the first full-scale portrait in four decades—charts his ascent from a tavern in the Hudson Valley to the presidency, concluding with his late-career involvement in an antislavery movement. Offering vivid profiles of the day's leading figures (Andrew Jackson, Henry Clay, John C. Calhoun, John Quincy Adams, DeWitt Clinton, James K. Polk), James Bradley's book depicts the struggle for power in the tumultuous decades leading up to the Civil War.

For the past two decades, you could cross the border between Northern Ireland and the Republic half a dozen times without noticing or, indeed, without turning off the road you were travelling. It cuts through fields, winds back and forth across roads and wends from the mouth of the Newry River to the mouth of the Foyle. It's frictionless - a feat sealed by the Good Friday Agreement. Before that, watchtowers loomed over border communities, military checkpoints dotted the roads and bridges had been demolished to prevent crossings.

The Nazi regime preached an ideology of physical, mental, and moral purity. But as Norman Ohler reveals in this gripping new history, the Third Reich was saturated with drugs. On the eve of World War II, Germany was a pharmaceutical powerhouse, and companies such as Merck and Bayer cooked up cocaine, opiates, and, most of all, methamphetamines, to be consumed by everyone from factory workers to housewives to millions of German soldiers.

Economic recovery, ever closer European involvement and Anglo-Irish highs were followed by Brexit lows and fresh talk of Irish unity. As the Republic enters its second century of independence, Diarmaid Ferriter tries to make historical sense of post-1990s Ireland - and what lies in the darkest corners of its archives.