Charlie and the Whiz Kids must separate fact from otherworldly fiction as they set out to find their missing classmate in this action-packed fourth novel of the Charlie Numbers Adventures series.As his school’s resident numbers guy, Charlie Lewis has always thought that if something can’t be proven with a math equation, it might as well be myth—which is exactly how he feels about UFOs. Charlie just can’t believe in the existence of aliens without verifiable proof. Not even J