Monster Manuscript, softback supplement for AD&D 1st edition, by Don Wellman
“An Adventurer’s Guide to Fantastic Creatures
A guide book for over a hundred fantasy creatures including many new monsters in addition to your all-time favourites, with complete descriptions, statistics and painting instructions.”
Back in the mid-eighties, Grenadier Miniatures released a series of twelve boxed sets of monster miniatures. This 36-page magazine-sized booklet came free with the first set. It contains descriptions and 1st edition AD&D statistics for all of the monsters in the entire series.