Scots Sanders hears skateboard sounds outside his window. He explores and discovers something incredible: the skateboarder is invisible? Why? What happened to do this to him? He investigates with his friends, the Vizzards, because they use certain magical and wizardly techniques (obtained from Scots' uncle) to solve mysteries. Through watching and observation, then confronting the ghost killed on the skateboard when he skated in front of a bus, they solve the case. Suggested age for readers: 7-10