Instructions: Take this list of authors, remove those whose efforts do not grace your shelves, and bring the list up to ten by adding some more that do. New paragraph indicates newly-added authors.

William Shakespeare
Robert Heinlein
JRR Tolkien
Raymond Feist
Stephen Donaldson
Terry Pratchett
Anne McCaffrey
Dante

Lois McMaster Bujold
Colleen McCullough

(I stole the list from daeron and demongrey simultaneously and melded the lists.)