Book I can listen to while working

I listened to Misery and the Off To Be The Wizard books, they were easy to follow while working. I tried listening to some Agatha Christie but it's way too hard to follow because I need to somewhat concentrate on my job. I'm looking for something crime/thriller/detective. Please suggest me books that don't have too many characters to remember :D. Please just suggest one or two books. Don't give me a big list since I wont be able to decide.