What book that hasn't been adapted into a TV show or movie do you think deserves an adaptation?

I mentioned Daemon and Freedom^TM by Daniel Suarez in another thread recently. I've often thought they'd make good Techno Thrillers. They got optioned once but I think it expired.

I think part of the problem is that the second book is a conclusion to the first. One falls flat without the other. So I think they'd be best suited to a single mini-series of 6 or 8 hour long episodes. And studios want franchises.