How to scan books to iPad 2

I have several text books that aren't available in iBooks or Kindle , but I would like to have them on my iPad 2. How can I scan these books into iPad 2?You can diy a digital scanner to do that.* Create a frame in which to hold your book and uses a rectangular frame to press the open book flat.* Connect the four corners by rods to the iPad 2.* After using the rear camera for taking the photos,