Advancing Into Analytics
George Mount
The 2nd Scientific American Book of Mathematical Puzzles & Diversions
Martin Gardner
Projektmanagement Am Rande Des Chaos
Alfred Oswald & Jens Köhler & Roland Schmitt
On Inoculating Moral Philosophy Against God
John M. Rist
Classical Philosophy: without Any Gaps
Peter Adamson
A History of Philosophy (1)
360 Problems for Mathematical Contests
Titu Andreescu & Dorin Andrica