“Thicker Than Water” is book 4 in the Felix Castor series by Mike Carey.
I’m not even going to try and summarize this bad-boy. It’s just a crazy-paced page turner. We find out more about Felix’s life before he became a freelance exorcist. More about his brother, the Catholic Priest. More about the Anathemata, the excommunicated millitant arm of the Catholic Church. Juliet, the succubus, gets involved in the action again. It’s just bam, bam, bam. Love it.