Theory of Language Syntax: Categorial Approach

Being Logical: A Guide to Good Thinking

Philosophy and Logic in Central Europe from Bolzano to Tarski: Selected Essays

Essays on Philosophy in Australia

A Rulebook for Arguments: Edition 5

The Comical: A Philosophical Analysis

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

Sophisms in Medieval Logic and Grammar: Acts of the Ninth European Symposium for Medieval Logic and Semantics, held at St Andrews, June 1990

Nonexistent Objects: Meinong and Contemporary Philosophy

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

Continuity and Change in the Development of Russell’s Philosophy

Essay on Liberalism: Looking Left and Right

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

The School of Franz Brentano

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

Formal Ontology

Leśniewski’s Systems Protothetic

A Course in Miracles - Explanations of Major Themes

Modal Logic with Descriptions

Time: Past, Present, Future