title_body: How to convert .epub to .pdb for testing I've seen some conversion sites that can convert .epub files to .pdb files but I was unaware of a source library or a way to convert a file locally for testing on the Nook.  So my question is: Do you know of a library or a way to convert an .epub file to a .pdb file to test on a Nook?  I would like to do this without using Calibre.
upvoted_answer: There is an old program called TL-PDB. The original authors site seems to be here according to this site, but I have some difficulty reading the original.
  
  You can read about it here and here as well (download sites for free software seem to copy each others content).
  
  Calibre can generate PDB output (not surprisingly as MOBI is a superset of PalmDoc).