Currently Being ModeratedAug 20, 2013 3:10 AM (in response to sunnydaygal)
No. On every purchase page in the iBookstore it has a Requirements section which tells you that an iOS device is needed to read the book.
Nonetheless some books, those in .epub format and without DRM may be readable on a PC or Kindle. Many free books and those from certain publishers like O'Reillly do not have DRM. For apps, do a google search on "how read epub on PC" etc.