Just released at https://epic-adventures.itch.io/dragonapping-free
It's more of a branching fiction novel than a gamebook, but there are four unique story paths with various choices along the way. It has achievements that are tracked through multiple read-throughs (as long as you use the save feature) and dynamic changes to the climatic scenes based on your previous choices. Over 60k words total.
The story follows the wizard Leonan as he goes to rescue a dragon that was abducted by an evil princess.