Company bows to howls by iBook authors and publishers on restrictions in
Safari Books Online offers access to a huge catalog of books and videos about computers and technology for a fixed monthly rate.
Kindle for PC is a very capable, full-featured and free e-book reader with great extras.
Apple will focus the new iBooks 2 primarily on textbooks, and its success could affect businesses in many ways.
Most observers believe that Apple will move into the textbook market, but how it will do so remains unclear.