<snort> Ha, ha...
I looked on the Wiki(now that I know there is one and what a 'wiki' is.
..) about the file system...You say you have a folder per book, for all of the files for that book. Now, that folder is in a folder for, say, 'hard SF' in the 'ebooks' folder. The cybook can deal with that? Does it take longer to load the library?