Definitely not my favourite Goosebumps book, but still an entertaining way to spend a couple of hours. This one has a weird goo that multiplies itself as well as making other things (including the main character’s dog) bigger. It’s as silly and cheesy as you’d expect a Goosebumps book to be, with a fair number of twists, but it doesn’t match the gleeful inventive fun of the best of the series.