I am surprised noone has brought it up yet. inDev Software (http://www.indevsoftware.com/products/tibr/) has made a wonderful Palm OS book reader that comes in three flavors. TiBR and TiBR Light are both free. Best if you look (http://www.indevsoftware.com/products/tibr/compare_tibr/) for yourself which one is the most interesting for you.

Btw, TiBR Pro can also read Plain Text files, something that most other readers lack.

It's a very nice doc reader (I've had a good play with it). I'd probably use it more if I didn't use iSilo for all my doc reading :)

Regards,
Craig.