I sprinted through this addictive book in three days and gasped more than once at the true story’s twists and turns.” —Esquire A NEW YORK TIMES BEST BOOK OF THE YEAR SO FAR In the early morning of November 29th, 2019, surveillance cameras at the headquarters of MI6, Britain’s spy agency, captured video of a young man pacing back and forth on a high balcony of Riverwalk, a luxury tower on the bank of the river Thames. In a quiet London neighborhood several miles away, Rachelle Brettler was worried about her son. At 2:24 a.m., he jumped into the river.