About all required readings, as well as many of the recommended readings are available electronically through Canvas, either under the "Course Resource" tab or, in a few cases, under the "Files" tab.

Many of the readings are also linked in the course syllabus when there are no copyright issues.

You may want to purchase some of the books, particularly those not available electronically or that may not be downloaded, specifically:

 

Do note that all registered students with a UNI number have access to both the TC library as well as the Columbia e-journal collections.

I personally strongly encouraged students, particularly doctoral students, to purchase personal copies of the books, as well as download and print articles.  This allows you to write in comments and such that will remain useful in your future.