Flat Stanley: Invisible Stanley

Brown, Jeff. 

One morning, after a terrible storm, Stanley Lambchop is nowhere to be found. His family can hear him, and there is a lump under his covers, but no one can find him! Just where is that boy?

Then they discover the truth—Stanley is invisible! At first there are great adventures for an invisible boy to have. Stanley becomes an unseen helper in a bike race, on a television show, and even fighting crime! But then Stanley starts to miss being seen, and he wonders if he will stay invisible forever.

It turns out that there is more to being invisible than meets the eye!