There are 2 books in the Samuel Carver series. The newest book is No Survivors which came out in 2009.

1
The Accident Man

Book cover of The Accident Man
Breathlessly paced, international in scope, and featuring one of the most intriguing heroes in recent fiction, Tom Cain's smashing debut surprises the reader at every turn. A thriller that explores the secret of Princess Diana's death, The Accident Man imagines the man who may have killed her. For a certain…
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2
No Survivors

Book cover of No Survivors
A follow-up to The Accident Man finds a broken Samuel Carver pursuing his lover, Alix, in an adventure during which he uncovers a messianic Texas billionaire's plot to trigger an international holy war by reactivating stolen Soviet nuclear bombs.