World Bank e-Library - One of the most comprehensive collections in the area of social and economic development. It covers all current and recent World Bank titles, documents and papers in PDF and other user-friendly formats. It has more than 1,396 World Bank Publications and over 1,938 Policy Research Working Papers.
Ebrary (eContents Platform)
Ebrary (eContents Platform) offers an increasing selection of more than 20,000 e-Books in business, economics, computers, engineering and technology.
Questia Digital Library
This online library that provides 24/7 access to the world's largest online collection of over 67,000 books and 375,000 journal articles in the humanities and social sciences.
Free Online Books : Listing more than 35,000 English works in various formats.