Welcome to the world of Monsters! Vroom - Vroom is a rhyming book about the adventures of Monster Truck Jams, the biggest, baddest competition around. Big, bold trucks making noise. Monster wheels and monster cheers. Smashing, crashing, cameras flashing. Two wheels then four, and donuts galore. 1-2-3, they're off and ready to rumble, tumble, flip and fall.