Justin Bieber publishes second book

New York — He's only 17, but pop sensation Justin Bieber is back with his second book.

HarperCollins announced on Tuesday that it will publish Justin Bieber: Just Getting Started.The book is described as "the second official photographic book" from the multiplatinum-selling superstar.

The company says it will be released worldwide in September.

'A million copies'

The new book promises a look inside the world of Bieber including him touring the globe, making a movie and recording his new album.

His first book, titled First Step 2 Forever: My Story, was published in 2010. It has sold more than a million copies in 25 languages.