> ... be a library it’s nowhere near real library (alphabetical list of authors).

What do you mean?

I just click the 'Author' column header and it sorts.

100gb is very big though. I guess I'm not surprised you would have problems with a library that size.

This post on reddit is relevant.

https://www.reddit.com/r/Calibre/comments/jl3wd2/how_large_i...