Dexter's Lab Ch Bk 4 - Dexter's Lab, Chapter Book Author:Pam Pollack, Meg Belviso Oh no! Dexter's archrival Mandark is at it again. This time he's come up with a truly nefarious scheme -- he's invented a special helmet that allow him to enter and control Dexter's dreams. The boy genius fights back, and soon he and his evil archenemy are locked into a "dream duel." With all this dream-fighting, Dexter barely has time for his i... more »nventions -- or school (he keeps falling asleep in class). There's only one person who can save him now -- his stoopid seester, Dee Dee...« less