H+ (Plus) A New Religion?

Inward

Textbook of Wisdom: Shortcuts to Becoming Wiser Than Your Years

The Art of Loving

Six Frames: For Thinking About Information

The Devil's Notebook

Parallel Thinking

A Rulebook for Arguments: Edition 5

How to Have Creative Ideas: 62 exercises to develop the mind

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

Serious Creativity: How to be creative under pressure and turn ideas into action

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

Five-Day Course in Thinking

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

How To Have A Beautiful Mind

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

Lateral Thinking: An Introduction

The Mechanism of Mind: Understand how your mind works to maximise memory and creative potential

A Course in Miracles - Explanations of Major Themes