D&D Dinos From Palaeo Games
At UKGE earlier this year, one of the very neatest things I saw was Dr Dhrolin's Dictionary of Dinosaurs, from Palaeo Games. It's a sourcebook for 5e DnD or 2e Pathfinder (these are two separate editions). I know . . . you have already seen a few sourcebooks this year.
This one is really cool. Permit me to elucidate!
Cool point number one: It is a very thoroughly researched guide to dinosaurs and other prehistoric creatures. And tbh, they had me at point number one, but it gets better.
Cool point number two: It is lavishly illustrated by Dr. Mark Witton, a noted palaeoartist. This is not some AI "draw me a dino" slop. This is the closest thing to reality that science can come at this moment in time, executed by a master of the craft.
Cool point number three: Not only does it have the expected DnD stats (size, hit dice, alignment, and so on) for each creature . . . but every one has a unique magic spell or ability. You don't have to use these, of course . . . but if your game leans toward the really fantastic side of fantasy, why shouldn't you be able to have a Microraptor as a familiar?