[reed13k]

I found it in a Meijers store as a semi-leatherbound ThunderDay Press book. Apparently first text copyrighted in ‘93 and this version is 2016. ISBN is 9781607109068.

Seems it’s a derivative work as there’s also a note that says First published by Mitchell Beazley a division of Octopus Publishing Group as “A Guide to Tolkien” and that some or all originally appeared in “A-Z of Tolkien”, “The Tolkien Bestiary”, and/or “The Tolkien Encyclopedia” also by Octopus Publishing 1979, 1991, 1993.

[Bob Ireland]

***I found it in a Meijers store as a semi-leatherbound ThunderDay Press book. Apparently first text copyrighted in ‘93***

Probably not very comprehensive. The Tolkien estate is very covetous of their copyright. I am aware of the books you mention but know nothing of Octopus Publishing.