Bourne Identity by Robert Ludlum
This is a story of a man without a past, rescued from the Mediterranean Sea by some fishermen. He is very ill, and his body has suffered the impact of many bullets. The man is taken by the fishermen to a doctor in a nearby island, who helps him to recover physically and mentally. Our protagonist doesn't remember who he is, but with the help of the doctor he finds some clues he doesn't like too much. He only knows for certain some things, for instance that his face has been altered by plastic surgery, that he knows a lot about firearms and that he carried on him a microfilm that contains the code to an account of four million dollars.
In the Swiss bank where the account is he also finds a name: Jason Bourne. But... is he Jason Bourne?. He cannot remember, and if it were for quite a few people, he won't. From the moment he leaves the island onwards, our man without a past will be followed, and attacked. He doesn't understand why, but he reacts in order to stay alive. Add to this already interesting mixture a woman he takes as a hostage, Marie, a number of assasins (including the most famous assassin in the world, Carlos), and the possibility that he is an assassin. The main character will be hunted all throughout the book not only by the "bad guys", but also by the "good" ones (mainly agents from the USA Government).
You won't be able to stop reading this book, and you will find yourself asking aloud to nobody in particular "who on earth is this man?" and "what started this whole mess"?.
I read this back in the 1980's and with the movies coming out decided I should re-read and see if enjoyed it as much as I did back then. The only bad side is that the technology is obiously dated as who would have a piece of microfilm inserted under the skin when we have tiny microchips. Of course in 20 years that will seem dated. But I really enjoyed the ride and love the movies. I need to read the rest over the summer.