Sentinel Prime"s betrayal has been revealed -- those many years ago he had made a deal with Megatron. Now, he has taken back the keys and the matrix so he and Megatron can open the space bridge and transport more Decepticon shock troops to Earth. Can the Autobots and their human allies stop the Decepticons before it is too late? From the Publisher: Long ago, on the distant land of Cybertron, Optimus Prime"s mentor, Sentinel Prime, sought to stop the war between the Autobots and the Decepticons. But his ship was shot down before his mysterious cargo could bring peace… or so the Autobots thought. When a component of Sentinel"s ship mysteriously shows up on Earth, Optimus Prime discovers that his old mentor may be far from gone. But Megatron and his Decepticon forces may have their own plans for Sentinel Prime. Explore these mysteries and what it means for the Autobots and Earth. Spotlight, a division of ABDO Group, publishes the most popular licensed fiction in the highest quality library editions. We use the original publisher"s digital files to adjust each book"s layout so no artwork or text is lost in the gutter in our printing and binding process. We also use the best glossy or acid-free paper, reinforced end sheets, side-sewn bindings, and laminated covers to withstand the circulation Spotlight will get in your library! FOR USE IN SCHOOLS AND LIBRARIES ONLY.