Who are some of your favorite "pulpy" authors?

With the 30th anniversary of Jurassic Park (film) having just passed, I've had Michael Crichton on my mind. I was introduced to him with Prey in middle school (undoubtedly a little early for the material) and I consider his work to be hugely influential in my love for reading today.

Bearing in mind at the end there he got a bit controversial, I still love almost every Crichton book I've read and have a few cherished copies of Prey and Airframe in my collection (IMO an underrated title in his backlist).

Are you a Michael Crichton fan and if so which titles do you most enjoy? Who are some other pop fiction authors you enjoy or consider guilty pleasures?