What do you like?

Old school spy novels: Frederick Forsythe, John Lecarre, Robert Ludlum

Modern Spy: Daniel Silva, Vince Flynn, Frederick Forsythe

Adventure: Ken Follet

African adventure; Wilbur Smith

Detective/adventure: Lee Child

Detective/Britian: PD James

Detective/Russia: Tom Rob Smith

Special Operations: Andy McNabb (stick with his non-fiction)

Humorous Adventure: Donald Westlake, Carl Hiaasen

Sci Fi: Larry Niven, Fred Saberhagen