Jack Higgins: Toll for the Brave (UK 2004)

From the Publisher:
Ellis Jackson woke up hugging a twelve-bore shotgun. In the next room, his mistress and his best friend lay naked on the bed, their heads blown to pulp. Back in England at last, Ellis Jackson had finally cracked.

Active combat, a Viet Cong prison camp and the callous treachery of his lover and interrogator, Madam Ny, had taken their toll. Ellis Jackson was out of his mind. Or was he? Maybe it would all have been easier to take if he really had been mad

Jack Higgins: Toll for the Brave. HarperCollins, ISBN: 0007127251 (November, 2004), 304 p., £6.99.