Beyond the Grave By Jude Watson

The fourth book in the 39 clues series, this book is the best because it has the most mystery and hidden secrets in the series. This series even has a website with sweepstakes at www.the39clues.com. Each book comes with cards and a code there are also 2 card packs.You only can sign up when you enter the code from book one. You go in a branch, (not of a tree of a family) play games, do missions, and earn clues there are 3 sweepstakes episode sweepstakes, book sweepstakes, and mission sweepstakes. More on the series later