Mathematics and plausible reasoning, volumes 1 and 2
György Pólya
An Introduction to Fuzzy Logic Applications
John Harris
Mathematical Logic
Heinz-Dieter Ebbinghaus & Jörg Flum & Wolfgang Thomas
The LaTeX Companion
Michel Goossens & Frank Mittelbach & Johannes Braams & David Carlisle & Chris Rowley & Christine Detig & Joachim Schrod
William Blake in the Desolate Market
G. E. Bentley Jr
Surviving as a "Software as a Service" (SaaS) Startup
Nick Birch