While the series is 30+ books long, you can pick any to start with. The story is fairly easy to pick up.
From Page 2227 in my Kindle Pagecount (probably Pg 200 in a paperbook):
"He blends, and he blends. Mr. Smooth, Mr. Nice Guy, Mr. Harmless"
Teaser Tuesday is a weekly bookish meme hosted by MizB of Should be Reading.