"Castle of Wisdom" is a Christian book of exceptional quality. I read it in one long sitting. Once I got into it, I could not stop myself. It is decidedly different from most religious or spiritual books. The story line is clever. The writing is not polished, but the descriptions of characters and circumstances are compelling. I especially liked the part where the main character, Elias, is trapped for something like six months on a barren plain with no company but his horse. He loses his mind, but he recovers it in a strange way. I rank this book among my favorite, and I hope to read more by Mr. Ellis.