Originally Posted by ppxnouse
That is why I started looking into the PRC format tonight. After 2 hours in front of my hex editor with some downloaded and some created prc files with and w/o cover art and coding a small parser, I still can not figure out how I (or the Mobipocket Reader :-)) can find out which PDB record actually contains the cover art. The attributes if the record header are always NULL. Sure I can look at the record data and see if it is a picture, but then, as you know, I get also the pictures in the book.
For the Cybook I think it is the first record after the HTML file records that is assumed to be a cover image. There is also a pointer to the first image record (the pointer is the record number or maybe the number of records used for header and the text in the book) for a MOBI header in 0x5c (4 bytes). What I did was to search for the first record with an image in it and assumed that this was the cover if it exsisted.