The Andromeda Strain deals with an extraterrestrial virus from a military satellite. The movie Westworld, written and directed by Crichton, is about a fantasy land where a gun-slinging robot, played by Yul Brynner, doesn't behave as he should.
The Terminal Man doesn't refer to someone about to die but direct connections between humans and computers. If I remember right people became addicted to stimulating themselves with these connections. Addicted to the network? You have to be kidding.
My favorite Crichton book is The Great Train Robbery about the meticulous planning and execution of a massive gold heist on a train in 1855. Not much technology but a very logical plot line. The movie, also written and directed by Crichton, not suprisingly follows the book quite closely.
I haven't enjoyed his later work as much. The mathematician Ian Malcomb in Jurassic Park comes off as a babbling philosophical know-it-all who happens to be always right. The ridiculous holographic database in Disclosure is just embarrassing. These later books often have gratuitous action scenes just so they might make better movies.
Nevertheless Crichton knew how to make technology very creepy. Even if these books were not quite that realistic they got the young me excited (and worried) about the power of technology and computers.