Title: The Hobbit (SparkNotes Literature Guide Series), Author: SparkNotes
Title: The Maps of Tolkien's Middle-earth, Author: Brian Sibley
Title: The Languages of Tolkien's Middle­earth, Author: J. R. R. Tolkien
Title: The Complete Tolkien Companion, Author: J. E. A. Tyler
Title: CliffsNotes on Tolkien's The Lord of the Rings & The Hobbit, Author: Gene B Hardy
Title: The Tolkien Companion, Author: J. E. A. Tyler