Quote:
Originally Posted by Fiat_Lux
[. . .] I didn't realize until today, that Calibre does not define PDF as an eBook file format [. . .]
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On what basis do you make that assertion?
IMO if calibre can convert from and to a file type it's a 'calibre eBook format', and calibre can convert to and from PDF. XLSX is a format one might store in a calibre 'document' library, but it can't be converted to anything, so it's not a 'calibre eBook format'
Quote:
Originally Posted by Fiat_Lux
Caveat # 2: Once the library exceeds a couple of hundred books, both Calibre Server and Calibre Companion are extremely painful to use;
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I use calibre server against libraries with > 100,000 books - painlessly.
Some of my colleagues have thousands of books stored on their Calibre Companion equipped tablets. Some even have tens or hundreds of thousands, via CC's cloud storage feature.
As in everything it depends on the use case and user preference. FX - I only keep a few dozen 'books' on my tablet, so CC would be overkill for me.
BR