Download or read book The Mission Unstoppable written by Dan Gutman and published by . This book was released on 2011-12-27 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: On a cross-country vacation with their parents, twins Coke and Pepsi, soon to be thirteen, fend off strange assassins as they try to come to terms with their being part of a top-secret government organization known as The Genius Files.