My favorite Michael Crichton book will still have to be Sphere though.
Unfortunately I saw the movie version of this, which I didn't really like, so it might be tough to read the book without picturing the movie the whole time.
Sphere was a fantastic read. In fact it is the only book I have ever read in one sitting. I absolutely could not put it down. I started reading in on a return business trip on Amtrak, and stayed up all night to finish it. The movie, of course, was a pale shadow of Crichton's prose. When he's on a scent, he's the best there is currently working. Sadly, he seems to be on a downward spiral, cranking out books to meet a contract, not writing a story that grabbed his imagination.
I am a hard science fiction fan, not a fantasy type (not that's anything wrong with fantacy-some of my best friends read fantasy) and the choices are few and far between. Since the passing of Sir Clarke, I find very few in the field worth the time. One notable exception being Flash Forward by Robert J. Sawyer (http://en.wikipedia.org/wiki/Flashforward_(novel)). Highly recommend his work to anyone tired of Hobbits and Trolls and anyone who carries a sword.
If anyone is interested in digital books (very sci-fi-ey) you can go check out Project Gutenberg's sci-fi section. Some real classics and worth a look (all free and public domain in the U.S.) Here is a link.
I'm a fan of Kim Harrison (Rachel Morgan - Dead Witch Walking) and Charlaine Harris (Sookie Stackhouse - Dead After Dark). I was excited to here that Ms. Harris' book had been adapted to a cable series but unfortunately I don't have the premium cable channels. **sighs** I'll have to wait until it's available to rent on NF.
I would like to recommend "1632" by ERIC FLINT ---- this is a story of a small town in West Virginia that is transported --lock--stock--barrel and dirt--the entire population , buildings,earth, etc. back into central Europe during the extremely tumultuous times wherein the Protestants and the Mother Catholic Church were at each other's throats--leaving death and carnage in their wake! The exposure of a bunch of hard headed members of the United Mine Workers and other varied town denizens of this rural town (with their wholly foreign ideas of freedom and equality) to the people of the early 17th century are FASCINATING! In fact, it proved so popular--that at least THREE sequels have been published to date!