Answer:

jrrtolkien

Answer	Crossword Clue
JRRTOLKIEN	Creator of Bilbo Baggins
JRRTOLKIEN	Bilbo Baggins' creator
JRRTOLKIEN	Fantasy writer who coined the word "tween"

JRRTOLKIEN	"The Lord of the Rings" author
JRRTOLKIEN	"The Hobbit" author
JRRTOLKIEN	Trilogy writer
JRRTOLKIEN	Composer of a famous ring cycle
JRRTOLKIEN	The Hobbit author
JRRTOLKIEN	Best-selling author who invented multiple languages