140 characters:
That's typical SONY behaviour!
They are extremly frightened that someone will copy a book that way
Sometimes I have the feeling this kind of guys live in a parallel universe. If you really want to copy a book, you never want to do it that way. Even if there would be no limmit, you normally could fetch a maximum of ONE page. Nobody wants to copy a whole book that way when there are a couple of 5-second methods available, to be found quickly after a short research with google.
I'll never understand this shortsighted thinking. SONY shooted itself in it's knees with a comparable behaviour with its Minidisc Players.
For example:
You where allowed to record over microphone or line-in whatever you want but SONY disallowed the possibility to transfer it to you PC
Or: You where allowed to do 3(!) transfers from CD to Minidisc (brute DRM; very often it did not work) but the quality was just 50% of a 'normal' Minidisc. But used 100% of the storage place on the disc. That led to a quality of a middle to low level MP3. And in the end MP3 defeated of course MD.
A