Proof Theory and Philosophy
by Greg Restall
Publisher: consequently.org 2006
Number of pages: 168
This is a usable textbook in philosophical logic, accessible to someone who's done only an intro course in logic, covering some model theory and proof theory of propositional logic, and predicate logic. User-friendly, pedagogically useful and philosophically motivated presentation.
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by Craig DeLancey - Open SUNY Textbooks
A Concise Introduction to Logic is an introduction to formal logic suitable for undergraduates taking a general education course in logic or critical thinking, and is accessible and useful to any interested in gaining a basic understanding of logic.
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