Realizing the importance of e-books. Keeping in view this fact, various sites have been searched and suitable sites for e-books have been identified which are listd below.
World book
UMDLText, e book, and e-text http://www.hti.umich.ed/egi/t/text/text-idx?
Meta Text
University of Pennsylvania
Library of Free e-books
Virtual books
Project Gothenburg
FCL e-book
Free e books
e-books and Bytes
e-Books on South Asia
Free Tech Books
Institution Archives
Campus Books
University of Virginia e-book Library
NAP Open Book
e-text Archives
Internet Public Library
Direct Textbook
Net Library
American Memory
Online Text Collection
e-books Palace
Memo ware
World Lecture Hall
Electronic Library of Mathematics