I have been a long time user of LibraryThing and of Calibre, which I have recently been working on (manually) synchronising. Various issues, but the two which are bugging me somewhat are in Series:
Firstly, LT allows a 1->many relationship with series. Is there any way of replicating that in Calibre?
Second, some of the LT series have rather 'interesting' series order, whereas Calibre only allows numbers. Perhaps most noticeable in the Liaden Universe
https://www.librarything.com/nseries...BLee-Miller%7D
Any suggestions?