Originally Posted by daffy4u
Have you visited the Visual Guide page Mobi2Mobi Advanced
? Even if you are using Calibre, there are examples of book labeling for seires.
The Honor Harrington example isn't optimal, [01HH] should be [HH01] otherwise [01SH] (Safehold 1: Off Armageddon Reef) will be sorted next to 01HH.