Will Gallows and the snake-bellied troll - Derek Keilty (Will Gallows #1)

Goodreads 3.46

Will Gallows, a young elfling sky cowboy, rides out on a perilous quest to bring the evil snake-bellied troll bandit, Noose Wormworx, to justice. Noose is wanted for the murder of Will’s pa — the former deputy sheriff of Oretown.

Will's journey takes him deep into the heart of the Westrock, to the dark underground city of Deadrock, where he soon uncovers a deadly secret that could spell disaster not only for Oretown, but for the whole of the Westrock.