As a longtime Marvin user I was thrilled to discover M3.
It is entirely my fault for not checking this forum earlier as I had not realised M3 was on its way. Consequently I started using another app and, believing that Marvin was 'dead', removed the app from both my devices.
Copying the books from Calibre is proving tedious as I can't find a way to 'select all' - I
have separate calibre libraries to correspond with my main Marvin collections.
Thank you for developing M3.
