I read Desperation first. I was scanning SK books at the store and when I read the opening page, I was hooked. And it did scare me in many ways. Plus, I still remember the absolute horror when
**without going into any real spoilers*
she squished the spider on her head. Ugh, I damn near threw up! :p
Anyhoo....I then read Regulators and once I got over the confusion of character names, it did settle into just a fun, shoot em up story.
I like them both, for far different reasons.