Odd Thomas by Dean Koontz rocks... its about a guy who sees dead people and they help him solve crimes, and one day this guy comes to town and brings these demon like creatures with him that only Odd can see, and he thinks something extremely bad is going to happen and wants to stop it... that was a bad description, but seriously, the book is great, and not nearly as cheesy as I made it sound. There are also some sequals but I didn't think they were as good, but they are called Forever Odd and Brother Odd.
Then there is an author named Ray Kurzweil, any keyboard players on the board will recognize the name from the keyboards and synthesizers he makes. Anyways, one of his books The Singularity Is Near talks about how in 40-50 years man could have the medical advances to live into their 120's-150's and by the end of the century maybe even hold off death indefinately. Its not quite fiction, but its not quite fact, its basically taking what man has done so far, and making an educated guess on what could happen. A very cool read though, especially if you are into science, technology or science fiction.