Schaum's Outline of Discrete Mathematics, Fourth Edition: Edition 4

How to Solve It: A New Aspect of Mathematical Method

Logically Fallacious: The Ultimate Collection of Over 300 Logical Fallacies (Academic Edition)

An Illustrated Book of Bad Arguments: Learn the Lost Art of Making Sense (Bad Arguments)

Fast Math: Learn the Secrets of Mental Math: By Using Vedic Math and Other Math Tricks to Perform Mental Calculations from Multiplication to Percentages without Calculators

536 Puzzles and Curious Problems

Foundations and Fundamental Concepts of Mathematics

Logic: A Very Short Introduction: Edition 2

That's Maths: The Mathematical Magic in Everyday Life

The Canterbury Puzzles and Other Curious Problems

A Beginner's Guide to Mathematical Logic

Puzzles of Reason: Journey into Logic

Topos Theory

On Formally Undecidable Propositions of Principia Mathematica and Related Systems

Set Theory and Logic

The Rules of Contagion: Why Things Spread - and Why They Stop

An Introduction to Category Theory

Topoi: The Categorial Analysis of Logic