University
Georgia Tech STEM textbooks
4 canonical courses indexed across Computer Science. Every book required or recommended below has live price comparison across Amazon, eBay, AbeBooks, Alibris, and Pearson InformIT.
Textbooks used at Georgia Tech

Introduction to Algorithms
ReqThomas H. Cormen, Charles E. Leiserson et al.
Used in 2 courses

Introduction to the Theory of Computation
ReqMichael Sipser

The Elements of Statistical Learning: Data Mining, Inference, and Prediction
ReqTrevor Hastie, Robert Tibshirani et al.

An Introduction to Statistical Learning with Applications in R
RecGareth James, Daniela Witten et al.

Hands-On Machine Learning with Scikit-Learn, Keras, and TensorFlow
RecAurélien Géron