Take a peek into the diary of Roblox Pro, Ari Avatar. He's just a regular kid from Blockville ... except when he finds himself in unique situations, like discovering dangerous portals and escaping active volcanos. Ari's best friends-Zeke, an obby and parkour pro, and Jez, the ultimate hacker and Queen of Tech-are right there with him. Get ready to join them by jumping headfirst into the world of Roblox, obbies, dragons and more in the first four books of this best-selling series!