Monster Blood - Turtleback School & Library Binding Edition - Goosebumps Author:R.L. Stine FOR USE IN SCHOOLS AND LIBRARIES ONLY. Evan visits an eerie old toy store and buys a dusty can of Monster Blood. But then he notices something weird about the slimy green ooze. It keeps growing. And growing. And growing. And all that growing has given the Monster Blood a monstrous appetite.