The Schwa Was Here

The Schwa Was Here
By Neal Shusterman

I really enjoyed this bizarre and fun story of a boy called the Schwa who is "partially invisible"; that is, no one seems to notice him--not his teachers, classmates, bus drivers...not even his own dad.
But one classmate, Antsy, who sometimes feels invisible himself, befriends the Schwa and they team up to use invisibility to their advantage. One adventure leads to another, and eventually there are some hard realities to face, and a real mystery to be solved so that the Schwa doesn't truly disappear.

Neal Shusterman wrote Downsiders, which I also loved.