Most of my books are E-Books and like the comments on your E-Book web page, it is hard to find them by name. You should add a filename hyperlink field to the database which displays on the book page. Double clicking the file name will run the associated reader with that filename.
Also, .LIT files are pretty standard and it seems like you could pull the Author/Title from the file.
Also, VIEW/Sort Books By/ Author seems like it would be useful addition.
Otherwise the program is pretty useful.