Quote:
Originally Posted by dwig
PDB is not an ebook format, per se. It is a data file format that originated on the PalmOS. There are a number of different and incompatible ebook formats that use/used the PDB (Palm DataBase) file structure. Not all of them are supported by Calibre.
What format are your PDB books? What reader software were they used with originally?
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They are Mobipocket books.