This is the third book that I expect to publish.
The primary concept is a portal fantasy in which all three youths travel to another world and are changed by the experience. That latter part can be seen as a coming-of-age arc. It is, in some ways, an epic fantasy, and all three have a large impact on the other world. Each book is one of those experiences.
I will be delaying the first one until I have a better feel for the other two, as the stories will be intertwined. I want to avoid continuity conflict. I also hope to release them with about a three-month spacing between them.