with OReilly can't you just enter the ISBN and get the book for $4.99?
edit: This is through registering your(already purchased) print books and then purchasing the corresponding e-book.
edit: This is through registering your(already purchased) print books and then purchasing the corresponding e-book.
Also, they spam out 50% off coupons for ebooks every week.
Sometimes I cheat and pay $5 for the pristine and versatile oreilly book. My rationalization is that I'm entitled to the highest quality reading experience because I'm paying them $50/mo for the subscription.