Originally Posted by ldolse
I still don't think it's safe to assume that prc is mobi - Calibre supports a number of ebook formats that were popular on PalmOS, mobi just happens to be the most popular one.
True (EReader comes to mind), but those would have a .PDB extension, as Palm datafiles should have. .PRC on Palm was supposed to be a program. AFAIK, there is no .PRC ebook that isn't a Mobi.
Still, we'll get there in the end, seeing Kiwidude's reaction