The Lord of the Rings: A Reader's Companion (2005) is a nonfiction book by the scholars Wayne G. Hammond and Christina Scull. It is an annotated reference to J. R. R. Tolkien's heroic romance, The Lord of the Rings.

The J. R. R. Tolkien Companion and Guide is a 2006 reference book by the husband and wife team of Christina Scull and Wayne G. Hammond. It provides a detailed chronology of Tolkien's life in volume 1, and a reader's guide in volume 2. The second edition in 2017 revised and extended the work, the reader's guide being divided into two volumes.