It was an ancient post without a confirmed resolution.
I'm working with PDFs rather than ePubs.
https://www.mobileread.com/forums/sh...d.php?t=292065
Kovid's "add/remove a book format" does not seem to work for PDFs.
I've tried QC PI and had no luck. Which option have you seen resolve this size issue?
And I don't think Tweak Books is in the latest Calibre?
Any help appreciated.