Monster Blood IV (Goosebumps)

Monster Blood IV (Goosebumps) by R. L. Stine. paperback edition. ISBN: 9780590113021.

Its Four Times As Evil!Evan Ross cant forget about Monster Blood -- the evil green slime that never stops growing. It can turn ordinary pets into ferocious animals and twelve-year-old kids into freakish giants.But now theres a new kind of Monster Blood in town. It comes in a can just like the others. Only difference is this slime is blue instead of green. And instead of just growing, its multiplying -- into terrifying blue creatures with razor-sharp teeth....