Wayne G Hammond is a librarian at the Chapin Library of Rare Books at Williams College Massachusetts. He is the author of The Graphic Art of C.B. Falls (1892), J.R.R. Tolkien: A Descriptive Bibliography (1993), and regular notes on Tolkien in the journal Mythlore.
Christina Scull is the former librarian of Sir John Soane's Museum, London. She is the author of The Soane Hogarths (1991), edits the journal The Tolkien Collector, and frequently writes and speaks about Tolkien.
Together, Wayne and Christina have written the two-volume J.R.R. TOLKIEN COMPANION & GUIDE and edited Tolkien's ROVERANDOM and FARMER GILES OF HAM 50th anniversary edition.