Contributed to a TTRPG ebook
Published an NPC eBook
Collaborated with other TTRPG designers
+1
I contributed to my first collaborative TTRPG product.

Candlekeep Colleagues was a collection of non-player characters based in and around the settlement of Candlekeep in D&D's Forgotten Realms. The release was timed to coincide with the Candlekeep Mysteries D&D adventure collection.

You can find it here.

I handled the writing for half of the characters whilst my co-author Chad completed the rest, and the project lead Anna did layout and art direction/acquisition. Our editor Matt did a great job making sure the writing all seamlessly came together.
I'm particularly happy with how Morty Buckleberry the halfling cook and Laaryn the dragonborn trainee scholar turned out.