Actually, it is anti-Christian. It's not merely about not mentioning it or something of that sort. Instead, it is clearly opposed to how Christians believe. The central question of this book was regarding where we will go when we die. I was disappointed that she presented various possibilities but excluded anything related to Jesus or God. She even had one of the characters state that believing, essentially in the way Christians do, is incorrect.
I have truly relished these well-written books. I seem to have an almost affectionate connection with the cats as if I know them personally. Therefore, this was a rather disturbing aspect for me.
Also, after listening to the one before this and then this one, it made me wonder why she subjects Kit to so much suffering. I don't have a liking for that. It makes me question the author's intention and the message she is trying to convey through Kit's experiences.