What a fascinating, clever, action-packed, and unique new science fiction middle grade novel from one of my favorite authors of all time! This book sure made me think, it made me question a lot about humanity, it made me wonder what to believe, and I devoured it in a single day. But it was also so entertaining and enjoyable!
 
 First of all, the originality was top tier. This is an idea that is so clever, and yet I can't talk much about it without giving away some of the book, which includes some surprising reveals throughout. So let me highlight the themes and why I couldn't put it down.
 
 The book starts off with main character Nathan revealing that his family is from another planet. They are on Earth to learn about humans, and if the aliens from their home planet can habituate Earth in the long-run. They are part of an Experiment of 12 families, and live fairly normal lives, except for a few things that they must adhere to as part of the Experiment. Every month, Nathan and his parents do a virtual call with the other families in the Experiment. But Nathan starts noticing that some of the kids have disappeared.
 
 The action is nonstop in this book. From the moment Nathan shows symptoms different than the other kids in the Experiment, it is clear that something big is happening. He starts to question everything he's been told, and with the help of some friends, including a surprising addition, sets off to uncover the truth. The details are vast and fascinating.
 
 Aliens may be a big part of the story, but above all, The Experiment is a book about family and friendship and what it means to be human. It's also a story about propaganda and beliefs, and what happens when we start questioning everything that has ever been told to us. Lots of layers woven in that will make for an excellent discussion.
 
 Recommended for ages 9+.