Open Books

  • Animals & Ethics 101: Thinking Critically About Animal Rights
    “This book provides an overview of the current debates about the nature and extent of our moral obligations to animals.”
  • A Concise Introduction to Logic
    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.”
  • forallX: an Introduction to Formal Logic
    By P.D. Magnus, professor and department chair in Philosophy at the University at Albany, this book “covers translation, formal semantics, and proof theory for both sentential logic and quantified logic.”
  • Form and Content: An Introduction to Formal Logic (Connecticut College)
    “Derek Turner, Professor of Philosophy, has written an introductory logic textbook that students […] can access for free. The book differs from other standard logic textbooks in its reliance on fun, low-stakes examples involving dinosaurs, a dog and his friends, etc.”
  • Fundamental Methods of Logic (University of Wisconsin – Milwaukee)
    By Matthew Knachel, “Fundamental Methods of Logic is suitable for a one-semester introduction to logic/critical reasoning course.”
  • Introduction to Philosophy series (Rebus Community)
    This open textbook series currently includes volumes on the Philosophy of Mind, Ethics, Logic, Philosophy of Religion, Epistemology, and Aesthetic Theory and Practice, and it will eventually include nine volumes. “We envision the books as helping to orient students within the topic areas covered by the chapters, as well as to introduce them to influential philosophical questions and approaches in an accessible way. The books may be used for course readings on their own, or in conjunction with primary source texts by the philosophers discussed in the chapters. We aim thereby to both save students money and to provide a relatively easy route for instructors to customise and update the resources as needed.”
  • Logical Reasoning
    “The goal of this book is to improve your logical-reasoning skills. These skills are also called ‘critical thinking skills.'”
  • The Originals: Classic Readings in Western Philosophy
    The readings in this book are organized by theme: The Value of Philosophy, Epistemology, Metaphysics, and etc.
  • Philosophical Thought: across cultures and through the ages
    The readings in this book are organized by theme—What Is Philosophy?, Metaphysics, Epistemology, and etc.—and are accompanied by commentary.
  • Plato’s Republic: An Introduction
    “This book is a lucid and accessible companion to Plato’s Republic, throwing light upon the text’s arguments and main themes, placing them in the wider context of the text’s structure.”

Open Courses

  • Introduction to Philosophy
    “This high discussion online course confronts the big questions human beings have struggled with for millennia, and engages in dialog with some of the world’s greatest thinkers and seekers. When you are done with the course you will be familiar with the terminology, chronology and conceptual language of some of the great philosophical traditions and will be able to knowledgeably discuss the ideas introduced by Plato, the British empiricists, Arthur Schopenhauer and others.” Click “Browse” to access course modules and resources.
  • Open Philosophy Courses (Open Yale)
    This set of Open Yale Courses includes “Philosophy and the Science of Human Nature” and “Death.”

ZTC Resource

The Stanford Encyclopedia of Philosophy includes nearly 1,800 entries on thinkers and topics in philosophy. The entries are authored by experts and updated as research evolves. See the table of contents for a comprehensive list of the entries that have been published or are in progress.