Recently, the Amazing Adventures TTRPG from Troll Lord Games got a bit of an upgrade via a new full-color printing run.
As a result, the older B&W version of the Amazing Adventures and it's Manual of Monsters is now available for free on the Troll Lord Games Store website; the differences between the older version and the newer version would be something similar to how the 7th printing of the Castles and Crusades TTRPG differs from the 8th and up (now at 9th-10th printings?) subsequent full-color printings.
PS. For those that would prefer to go through the DriveThruRPG website, only the pdf of the Manual of Monsters is available as well.