I didn't know the first thing about this book other than that the next one in line, The Regulators, was published under the Richard Bachman name and acts as a sort of companion piece.
As I write this, I'm already more than halfway through Desperation and have read a little about The Regulators, so know that any assumptions I had about the relationship between the two books is completely wrong.
I'd imagined the two books being two perspectives on the same story and highly anticipated seeing how King would handle this approach. While it turns out that it's completely unrelated, I'm still going to bluster ahead with a recommendation of Lucas Belvaux's 'La Trilogie' - three films with interlocking plots and characters that are played out in different genres - Cavale/On the Run (thriller), Un couple épatant/An Amazing Couple (romantic comedy/farce) and Après la vie/After the Life (melodrama). They're not perfect films either individually, or even as a whole, but they're mightily impressive and very powerful.
Now I've got that out of my system, I'll get back to reading Desperation, as it's treating me very well so far. There are some echoes of The Stand, except I'm actually enjoying it and hammering my way through it. Sweet.