Andromeda Strain is classic, really on the same level as Jurassic Park (yes, I know the movie JP was much better than the movie of this, but the books are equally great!).
Highly recommended, you won't regret the time spent reading it.
Saw this movie when I was a kid and the book is great. The techincal stuff adds to the realism without killing the story. Those interested can pour over it, those not can skip over and not lose their way. Great suspense and style. A good start for those getting into Crichton.