Focusing on science and technology
- CRC ENGnetBASE (Over 900 ebooks in engineering)
- Morgan and Claypool Synthesis (Over 100 ebooks in computer science and engineering.)
- Safari Books Online (from Proquest -- This includes books from O'Reilly.)
- SpringerLink e-books and e-book series. Some of the series include Lecture Notes in Mathematics and the Lecture Notes in Computer Science.