Unclutterer reports that
O'Reilly tech books has an ebook promotion for $4.99 per book you already own. This looks quite useful to me:
- O'Reilly ebooks come as a bundle of three common formats (mobi, pdf, epub)
- they are un-copyprotected, a.k.a. not locked to existing software/hardware readers
- while only a fraction of their books are currently available in ebook, some others are also available as pdf
To get the $4.99 books, you need to make an account on their site, register the ISBNs of your books, add them each to your cart, and use the 499UP discount code. I tested one book, and it appears to work.
I may just have to get busy with our barcode-reader at work, since that's where my O'Reilly books live now. I figure at least a dozen of my books are worth future-proofing in case I eventually buy a portable bookreader. :)