Jake Maddox 
Terror in the Caverns [EPUB ebook] 

Mia and Deshawn can’t wait to get to Action World. So when their parents make a pit stop at Maximum Caverns to go cave spelunking, the two siblings are less than excited. Things go from bad to worse when an accident takes Mia, Deshawn and their guide, Raven, off their trail and onto an advanced route. Mia and Deshawn will have to dig deep and work together to make it out of the caves.