My guess is that it is a book written to capitalize on M S Dhoni’s fandom. His fandom is great indeed – in numbers. So that works for the book.
But if you are indeed a fan, why be apologetic about it? Go ahead and buy here (the price might change, check the price before buying):
If Kindle is not your thing, or you need to display the book in your book-case or on your desk, then there is the paperback too. Not too expensive either.