Turbo Twenty-Three

I don't read series. Yet somehow I've read all twenty-three of these Stephanie Plum mysteries. How to explain that? It's the characters. I'm crazy about Grandma Mazur and Lulu and Ranger and Stephanie's parents and all the bad guys Stephanie encounters in the course of her work as a bounty hunter. As long as Janet Evanovich keeps writing ‘em I'll keep reading ‘em.