I assumed it to be a children's literature but felt it wasn't one. Now here are my reasons to why I believe so, or to be exactly why I ended up disliking the book.
Almost all child dies. The storyline is almost the same for all the accounts. A young child accepts Jesus as the Messiah, prays regularly, speaks words of wisdom, and yes I agree that all that is good. But they all die before they're even 10 or 15. It was repetitive, monotonous and made it uninteresting. The title should have read, 'Stories of Boys and Girl Who Loved the Saviour but they all passed away very early'.