At Audible for $2.51 for members is
Hit Man, by Lawrence Block, the first in his Keller series.
I don't know anything about this book, which is rated 3.98 stars at GR, but I know Block is popular. Right now the book's regular price is only $5.03, so this refects the 50% off sale for members; I don't know if that regular price will persist or not, but this seemed like potentially good listening for a trivial sum.