10 authors, of whose books I've read at least five:
Terry Pratchett
Brandon Sanderson
Neil Gaiman
Piers Anthony
Brian K. Vaughan
Warren Ellis
Garth Ennis
Kieron Gillen
Bryan Lee O'Malley
Matt Fraction
Gosh that was harder than I thought it would be. I felt like using #GraphicNovels might be cheating but I guess I don't read a ton of longer series otherwise.
Firlefanz