I read this book in third grade thinking it would be as good as other Roald Dahl books such as Matilda and The BFG, but what I got was a strange and pointless book that made absolutely no sense to me. To sum it up, it's basically about a kid who makes this "medicine" for him mean grandma and makes her turn into a giant. Then he tries to make the same potion again, only it reverses and shrinks his grandma until she is an invisible speck. The end. It stinks.