Justin Bieber has already written a memoir, despite being only 16.
The teen pop sensation has penned Justin Bieber: First Step 2 Forever: My Story, which will be released by HarperCollins in October.
The publisher says the book will reveal Justin's "amazing journey to stardom."
The book also will include previously unseen photos for "fans afflicted with Bieber fever".
Justin said: "Every day I wake up and count my blessings. My fans have played such a large part in all of this and they help me live my dreams every day. I'm excited to share just a little bit more of my world with them through this book.
"Between the behind-the-scenes pictures and the story I think this is going to be something they can all enjoy. This is just another way for me to say thank you to my fans."