Time Break
This may be the best of the series so far. Action and suspense on top of action and suspense. Oh yeah, throw in a possible satellite in prehistoric times. Am so hyped up for the fifth book. The ending to this one was shocking. Heck of a cliffhanger. So sad to have to read a young adult book to get a good story, great characters, And decent language. Nothing ruins a good story like profanity. Well done. Truly recommend for all readers.