The second installment of the popular multimedia children's book series "The 39 Clues" is scheduled for release in April, the publisher said. Scholastic, the American publisher of the Harry Potter series, introduced "The 39 Clues" in 2008 as a 10-book mystery series for 8-to-12-year-olds. The second part of the series will be "The 39 Clues: Cahills vs. Vespers," and like the first part will include an online game and collectors' cards.
Loved this concept, and it was beautifully executed: I hope it continues to do well.