Fatherland

Brilliant alternative history book where Germany after winning WWII a preparing for a visit of the U.S. President. But after a police officer finds a naked man killed at the river, what he found during the investigation, can change everything...

Enigma
A matemathician returns to Bletchey park just to find himself in the middle of an mysterious spy game where surprises waiting for the reader even on the last pages. ( )

Good thrillers both, and I know both have been made into Movies, one I think for TV and the other(Fatherland), being a theatrical release. ( )