CLUES
an old steamer trunk
a howling beast
roasted garlic meatballs

Scooter Spies Max, Oscar, and Lily (and her pet chameleon, Speck) are up to their necks in mud in their latest case, The Ghost That Barked. While practicing their moves at a construction site, the scooter riders uncover a mysterious old steamer trunk -- and hear a wild howl in the night
A blue paw print leads the three friends directly into a daring museum escape, a secret scooter ride across town, and smack into a giant mountain of goopy, gloppy mud

Eleven-year-old Max Martin and his fellow scooter riders Oscar Santiago and Lily Blue (and her pet chameleon, Speck) are hot on the trail of a thief in a puzzling case: The Wheels That Vanished. Max saw a strange green bicycle whiz by him onto a bridge. But it never came out the other end How could it have vanished?
The thief on the bicycle stole two very important things, and now it's up to Max, Oscar, and Lily to use their clues, and their scooters, to find them. It will take the best scooter skills they have, and a wild scooter ride, for the three friends to catch the crook