His book is The Junior Officers' Reading Club: Killing Time and Fighting Wars.
For The Week magazine, he recommended six books to take to war. One title on his list:
Catch-22 by Joseph HellerRead about the other books on Hennessey's list.
I loved Heller’s masterpiece before I joined the British army, but didn’t realize how scarily accurate it was. War shouldn’t be laugh-out-loud funny, but it can be, and Heller’s book catches that expertly. Despite its dark humor, Catch-22 retains a glimmer of hope—“Yossarian lives.”
Catch-22 is among Jasper Fforde's five most important books, Thomas E. Ricks' top ten books about U.S. military history, and Antony Beevor's five best works of fiction about World War II. While it disappointed Nick Hornby upon rereading, it made Cracked magazine's "Wit Lit 101: Five Classic Novels That Bring the Funny."