Monster Manual (1977)

From the front cover:
"An illustrated compendium of monsters: Aerial Servant to Zombie"

From the back cover:
"OVER 350 MONSTERS
This book provides a complete alphabetical listing of all 'monsters' encountered in the various works which comprise the Advanced Dungeons & Dragons game system. It is an invaluable aid to players and dungeon masters alike!

For example:

The first book of the Advanced Dungeons & Dragons line.

Like the Players Handbook, this has an odd printing history.

The first three printings are actually really easy to tell apart.

1st: Lizardman logo, red centered "Advanced Dungeons & Dragons*" with a small note under that "* TM Reg. Applied For"
2nd: Lizardman logo, red centered "Advanced Dungeons & Dragons(R)"
3rd: Wizard logo, red centered "Advanced Dungeons & Dragons(R)"

After that, it gets a little weird.

For some reason TSR ran out of covers for the third printing long before anything else, so pseudo 4th printing covers were used with 3rd printing interiors. However, the covers actually differed slightly from the 4th printing covers in that there was no ISBN number on the back. More of these were printed than any of the Player's Handbook or Dungeon Master's Guide hybrids, and they are certainly easier to spot.

3.5th: Wizard logo, red upper left corner "Advanced D&D" on yellow band, no ISBN on back. Still says 3rd on title page.
4th: Wizard logo, red upper left corner "Advanced D&D" on yellow band, ISBN on back.
5th: Wizard logo, red upper left corner "Advanced D&D TM" on yellow band. Still says 4th on title page.
6th: Face logo, red upper left corner "Advanced D&D TM, Adventure Games" on yellow band. Still says 4th on title page.
7th and later: Red Dragon cover. Says 4th Edition on title page until the 9th printing.

Microbadges:

D&D Player
AD&D fan (1st edition)
Dungeons & Dragons fan
Dungeons & Dragons fan
Dungeons & Dragons fan
I'm an old school D&D player
I'm an old school Dungeon Master
Gary Gygax fan
Gary Gygax fan