CAA: Christian Anime Alliance

I just picked this up from the library.
Is it a series or a one-volume?

Is it appropriate?
From what I`ve seen, it doesn`t look any worse than Samruai Champloo.

According to Anime News Network, it's only 1 volume.

As for content, I don't know as I haven't read it, but I found this.

It has an odd rating, but I already finished it in a half-an-hour sitting.

Quite a short book.