Small Favor
Jim Butcher
The Sign of the Four
Sir Arthur Conan Doyle
Cyclops
Clive Cussler
Dirk Pitt (8)
The Tomorrow Code
Brian Falkner
IQ Puzzles
Arcturus
Fantastic book of logic puzzles
Muriel Mandell; illustrated by Elise Chanowitz
Mathemagic: Magic, Puzzles and Games With Numbers
Royal V. Heath