And before you complain that your library doesn't have many good CS books, look into inter-library loan. Libraries can often ship from other branch and regional

And before you complain that your library doesn't have many good CS books, look into inter-library loan. Libraries can often ship from other branch and regional libraries, and sometimes from both public and academic libraries throughout the US* (generally for a small fee, and be patient). I've borrowed rare books (including the Codex Seraphinianus!) for several weeks through my library, for $5. Of course, if you have access to an academic library, particularly at a university with a decent CS program, start there. Particularly if you're looking for research papers, rather than books - it's what they do. (I worked in a library for several years. <3.) * I'm assuming you're in the US - I don't know about public libraries elsewhere.