Originally Posted by kovidgoyal
The library file becomes pretty large (mine is 1GB) I doubt keeping it on the reader is a good idea. I'm still not convinced that the database is actually losing books. I'd suspect in Scarpad's case that the library1.db file was deleted/moved in which case a new blank one is automatically created and in jplumey's case he probably deleted the books himself and forgot about it.
yeh that is a fair point never thought about it getting that big.
I have a recent back up fortunately at all times as I now use timemachine to back up the entire machine.