Listmania!
Great series starting points
Killing FloorKilling Floor by Lee Child
Buy new: £4.97 / Used from: £0.01
Jack Reacher is a drifter with a difference: an ex Military Policeman in the US Army. Some of the punchiest thriller writing available.
Flashman (The Flashman Papers)Flashman (The Flashman Papers) by George MacDonald Fraser
Buy new: £5.49 / Used from: £0.01
The greatest series ever written. Complete coward and cad Harry Flashman is woven into the greatest military events of the 19th century
Every Dead ThingEvery Dead Thing by John Connolly
Buy new: £5.97 / Used from: £0.01
Charlie Parker is an embittered ex-cop turned PI whose wife and daughter are slaughtered. Dark, twisted and twisting thriller.
The Black EchoThe Black Echo by Michael Connelly
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Harry (Hieronymous) Bosch is an LAPD homicide detective. An intelligent, gripping and gritty series.
Deal BreakerDeal Breaker by Harlan Coben
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An ex-basketball player sports agent with a sideline in detective work? Called Myron Bolitar? Shouldn't work - but these humorous and clever thrillers suck the reader right in.