mwheinz,
Go ahead... I, for one, would like to give it t try.
JCShortcovers,
In the Time Machine Control Panel, set the option to show Time Machine in the menu bar, then when the 'disk' (your reader or card) is mounted, choose Backup Now from the TM menu. If you have a lot of books, the first backup might take a while. After that, they should go pretty quick. Should work.
Kent Walters