Monster Blood is the third book in the original Goosebumps book series. It was first published in July 1992. The book follows Evan Ross and his friend, Andy, who discover the disturbing secret about Monster Blood, novelty slime which makes people and animals grow bigger like giants. The book was followed up by three sequels. Monster Blood II, Monster Blood III, and Monster Blood IV. The illustration on the cover shows the Monster Blood oozing down the stairs as a pair of glasses are seen.