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:
Tristram Shandy by Laurence SterneRead about another novel on Hennessey's list.
There is something so gentle and human about Sterne’s inspired novel, and I liked to keep it close by as a counterpoint to the violence of conflict. A million miles in every sense from Baghdad or Helmand, but, in its own way, a great anti-war book. It’s also one of the funniest and cleverest books in the English language.
Tristram Shandy appears among John Mullan's list of ten of the best deathbed scenes in literature, the top ten works of literature according to Peter Carey, Thomas C. Schelling's influential books, and Bamber Gascoigne's six best books.