title_body: How to fix Calibre Author amalgamations?
upvoted_answer: The comma (,) can be part of the name  (e.g. in names having the suffix , Jr), but also when they are in reverse order: Mack, David.
  So you cannot use that to separate names and because of the second use, if a comma is already there the name doesn't get split and reordered, as Calibre thinks that has already been done.
  
  I use the word and between names, but IIRC you can also use the ampersand (&amp;), to separate the names:
  
   David Mack and Marco Palmieri and Dayton Ward and Kevin Dilmore
  
  
  If you put that in Calibre's Authors field and click the right arrow next to it the resulting Author sort field will be:
  
  Mack, David &amp; Palmieri, Marco &amp; Ward, Dayton &amp; Dilmore, Kevin
  
  
  and your book will be under M