Release Notes
https://github.com/kiwidude68/calibr...ct_isbn-v1.6.2
This now uses podofo as per Kovid's suggestion. @Shet please let me know how you get on with this one.
To anyone who had tried using the zip I had attached yesterday of a test build - please make sure you replace that version with this one (it had the same version number so you will have to force install it).