These links will take you directly to the portions of databases that contain materials relevant to Computer Science. However, this is by no means an exhaustive list. Feel free to explore the General Collections to find additional resources.
Bookboon.com contains free eBooks and textbooks that can be downloaded as a pdf, no registration needed. These books cannot be altered, but can be freely printed, shared, or embedded in non-commercial ways. They are intended only for individuals, colleges, and schools.
Free textbooks (aka open textbooks) written by knowledgeable scholars are a relatively new phenomenon. Below, find a meta list of Free Computer Science Textbooks, part of our larger collection 200 Free Textbooks: A Meta Collection. Also see our online collection, 1200 Free Online Courses from Top Universities.
The Computational Science Education Reference Desk (CSERD) is a Pathways portal of the National Science Digital Library and funded by the National Science Foundation. CSERD aims to help students learn about computational science and to help faculty and teachers incorporate it into the classroom.