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Textbooks by Subject
Philosophy  
   
An Introduction to Philosophy (CC-BY-NC-ND)  
Computers and Ethics (CC-BY-NC-ND)  
Consciousness Studies (Assayer review) (CC-BY-SA)  
David Hume (CC-NC-BY-SA)  
Formal Logic (CC-BY-SA)  
Historical Introduction to Philosophy NR (CC-BY-SA)  
Internet for Philosophy (CC-BY-NC)  
Introducing Philosophy (CC-NC-BY-SA)  
Introduction to Ethical Studies (GDFL)  
Introduction to Formal Logic (CC-BY-SA)  
Introduction to Logic (CC-BY) (BoundCopy)  
Logic and Proofs (CC-NC-BY-SA)  
Medical Ethics (CC-BY-NC-ND)  
Philosophy of Religion (CC-BY-NC-ND)  
Reading for Philosophical Inquiry: A Brief Introduction to Philosophical Thinking, An Open Source Reader, (GFDL)  
Walden by H.D. Thoreau (PD)  
     
     
Disclaimer: College Open Textbook has not yet vetted all of the open textbooks on this list for quality or accuracy of the content. However, peer reviews, as indicated by a "*" next to the book title, are available at the reviews page.
License Attributes: BY=Open w/ Attribution. CC=Creative Commons license.  GFDL=GNU Free Documentation License. GGPL=GNU General Public License.  NC=Non-Commercial. ND=No Deriverative Works. PD=Public Domain. SA=Share Alike.