The Fantasy Review’s list of 12 Very Long Fantasy Series That Will Take You Years to Complete.
Vorkosigan Saga by Lois McMaster Bujold
Genre: Science Fiction / Space Opera
Number of Books: 16
Start With: Shards of Honour
The Dresden Files by Jim Butcher
Genre: Urban Fantasy
Number of Books: 17
Start With: Storm Front
The Wheel of Time by Robert Jordan
Genre:: Epic Fantasy
Number of Books: 14 (+ 1 Prequel Novel)
Start With: The Eye of the World
Malazan by Steven Erikson and Ian C. Esslemont
Genre: Epic Fantasy / Dark Fantasy
Number of Books: 30
Start With: Gardens of the Moon
Riftwar Cycle by Raymond E. Feist
Genre: Epic Fantasy
Number of Books: 30+
Start With: Magician: Apprentice or Daughter of the Empire (co-written with Janny Wurts)
Shannara by Terry Brooks
Genre: Epic Fantasy
Number of Books: 30+
Start With: The Sword of Shannara
Discworld by Terry Pratchett
Genre: Fantasy
Number of Books: 41
Start With: The Color of Magic / Guards! Guards! / Mort / Equal Rites
Xanth by Piers Anthony
Genre: Epic Fantasy
Number of Books: 47
Start With: A Spell for Chameleon
Valdemar by Mercedes Lackey
Genre: Epic Fantasy
Number of Books: 58
Start With: Arrows of the Queen
Dragonlance Universe by Various Authors
Genre: Epic Fantasy
Number of Books: 200+
Start With: Dragons of Autumn Twilight by Margaret Weis and Tracy Hickman
Warhammer 40k Universe by Various Authors
Genre: Science Fiction / Fantasy
Number of Books: 1000+
Start With: The Horus Heresy series (58 books), starting with Horus Rising by Dan Abnett
Forgotten Realms by Various Authors
Genre: Fantasy
Number of Books: 290+
Start With: The Legend of Drizzt series by R.A. Salvatore (40 books), starting with Homeland
