This book is a choose your own adventure. My favorite part is when I[or you] have to go in the well. It is very interesting because it has a ninja and I like ninjas. It looks like a chapter book, but it's not. The characters are you ,Nina,Gin, Nikkina, and the ninja. WARNIG!!! Do not read this book straight through. It will make no sense. I highly recommend that you read this book. I love this book so much I read it 2 times a week . This book can have up to 29 different endings. The adventure that I had to take was to go back in time and find the ninja and learn how to do karate. And it didn't go to well. I never ever got to learn how to do karate. I want to give this book at least 7 stars. It is a series, but I chose this book. My favorite character is the ninja because he looks cool. And there are pictures. I like the secret of the ninja.