Splinterz: Book #1 from THE FREAKY SERIES

Sam hates the move from the city that his parents made. But in the “ticks” of Agnath he found a new best friend, Jared, a tall skinny redhead with a gazillion freckles. They discover underground tunnels right below them with deadly inhabitants. Read how Sam and Jared explore the strange, alien tunnels, while along the way sending the first frog into space using jet-propelled buttocks. Just make sure you're as brave and daring as Sam is, before you turn the first page.