Giới thiệu
Scenario: This is the one you've been waiting for. Lots of Formula One drivers started out kart racing. You feel the need... the need for speed. Can you handle the corners? Welcome to the Xtreme World of Billy Kool.Thrill-packed new series from the author of the best-selling Toocool books! In the new Xtreme series, the adventure moves from the backyard to an extreme sports television program. Each book in the series features a different extreme sport.