4th Bestselling Children's Book Series of all Time ―The New Yorker When you wish for your own fairy, you're a bit surprised when Bert the Below Average shows up. But there's nothing average about the magical adventures in this gamebook from the popular Choose Your Own Adventure series! Bored and ignored by your busy parents, you decide to go outside and build a fairy house. Just when you're sure nothing is going to happen, you meet Bert the Below Average: a real, live fairy. He's not exactly what you had in mind. But he'll do. Let the Fairy House adventures begin! Choose Your Own Adventure is the bestselling gamebook series of all time. Empowering generations of children through choice, it is widely commended for its appeal to reluctant readers.