Extenics in Higher Dimensions

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

Problems with and without … Problems! (Translated from French)

The Philosopher's Book of Questions & Answers: Questions to Open Your Mind

Nidus Idearum. Scilogs, III: viva la neutrosophia!

How to Win Every Argument: The Use and Abuse of Logic, Edition 2

Proposed Problems of Mathematics, Vol. II

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

A Unifying Field in Logics: Neutrosophic Logic. Neutrosophy, Neutrosophic Set, Neutrosophic Probability (third edition): Neutrosophic Logic : Neutrosophy, Neutrosophic Set, Neutrosophic Probability

A Course in Miracles - Explanations of Major Themes

Nidus idearum. Scilogs, II: de rerum consectatione

Being Logical: A Guide to Good Thinking

Nidus Idearum. Scilogs, I: de neutrosophia

Proposed Problems of Mathematics, Vol. II, Second edition - entirely translated to English

A Reasonable Response: Answers to Tough Questions on God, Christianity, and the Bible

+ nEoGeOmEtRiSm +: Composed, Found, Changed, Modified, Alternated, Or Computer-programmed Art Works in a Geometrized World

There Are Two Errors in the the Title of This Book, Revised and Expanded (Again): A Sourcebook of Philosophical Puzzles, Problems, and Paradoxes, Edition 3

Only Problems, not Solutions!

The Critical Thinking Toolkit