From the campaign:
From the creators of the titanic Tome of Beasts! Kobold Press is at it again, with a lethal and highly entertaining horde of 5e-compatible monsters to challenge new players and veterans alike.
The Creature Codex will bring over 300 new monsters to 5th edition, including lotus golems, wasteland dragons, shadow goblins, and so much more. All Creature Codex Kickstarter backers can submit an original monster design for possible publication, while high level backers can commission Kobold Press to design and illustrate their monster idea. In addition to the Creature Codex, this Kickstarter will fund the creation of monster pawns, encounter maps, and more!
The campaign's more than 4x funded, with still 16 days left to go.