Subreddits for authors and book series

A Song of Ice and Fire books and Game of Thrones.

H. P. Lovecraft's Cthulhu mythos.

Terry Pratchett's Discworld.

The Dresden Files books by Jim Butcher.

Frank Herbert's Dune and its adaptations.

Christopher Paolini's Inheritance Cycle.

Harry Potter books, films, and lore.

The Hunger Games books and films.

Patrick Rothfuss's Kingkiller Chronicle.

The Lord of the Rings.

The Lord of the Rings books and films.

H. P. Lovecraft's fiction.

Brandon Sanderson's Mistborn.

Brian Jacques's Redwall books.

Shakespeare's plays, poems, and performances.

Stephen King's books.

Brandon Sanderson's Stormlight Archive.

Stephen King's Dark Tower series.

Tolkien's The Hobbit and its films.

Tolkien's books and lore.

Robert Jordan's The Wheel of Time.