The Vengeful by Chantel Fourie

A fast paced, fantasy adventure featuring Zack, a teenage boy who is pulled into another dimension which contains creatures called the Vengeful who steal souls. Can he navigate this new world and save his brother? Highly recommended.
You can check out Chantel's works on Goodreads at: 
https://www.goodreads.com/author/show/12608851.Chantel_Fourie