Not a bad little story. I wish I'd gotten a paperback instead of a pdf so Boo could read it. Amazon only has the Kindle version, though, so maybe it's only available digitally.
Writing is a little simplistic, but I think that's mostly because it's aimed at a younger audience. I would put the target age range at 6-10. Boys should like this one.
The main character is a misunderstood 11-year-old boy who suddenly discovers that there's far more to his family's past than he'd ever dreamed. Soon he's on a wild journey through a magical land with a Hopper as a guide. (Don't call him a frog.)
MAJOR cliffhanger ending, so be warned. This one is in some ways just a set-up for the series. Not sure how many are planned.
If you have a child the right age and a Kindle (or equivalent), probably a good one to try out!