Marianne Hering 
In Fear of the Spear [EPUB ebook] 

Over 1 million sold in series!Patrick and Beth have escaped from volcano lava only to be separated again, and no one knows exactly where Beth has gone. Eugene and Patrick frantically try to fix the Imagination Station so they can find Beth, who unbeknownst to them has landed in the Amazon jungle. Will Patrick find Beth? Will Eugene be able to fix the broken Imagination Station? What will happen to the strange man with the spear in his side? Find out in the latest Imagination Station adventure!