For Firefox, you should have Greasemonkey installed first. For the other browsers, I don't know...
Page Keys - It's pretty simply, after installation, open a book at Google Books and you can read the book with your left and right arrow keys rather than the mouse.
Google Books Full Full Screen - Another very simple script. Install this and Google Books will become much larger and take up your whole screen rather than the bottom 2/3rds.
More later...
