1.ChaoXing Ebooks
ChaoXing Ebooks collects 1.54 million Chinese e-books and 340 thousand new books after the year of  2000.

2.The SpringerLink Platform
SpringerLink can provide the English e-books since the year of 1996 and 1,084 electronic books.

3.Cambridge Books Online Cambridge Books Online offers predefined or bespoke collections of content within a richly functional, fully searchable online environment for over 12,000 books.

4.Oxford Scholarship OnlineOxford Scholarship Online (OSO) offers quick and easy access to the full-text of over 8,000 monographs in 20 subjects which cover humanities, social sciences, science, medicine, and law.