I'll save you some time.
A summary's good enough.
But, still a bit much...

An evil chemist/scientist develops a very strong coffee plant with about double the caffeine, but still has a decent flavor. (Pure fiction b/c caffeine is very bitter -- better coffees are not that strong.)
He makes some interesting deals and blackmails people, etc. He has a successful coffeeshop/restaurant. He rents out one of his locations for a meeting one day. Japanese businessmen planning nuclear terrorism. He doesn't report it, but uses this info to play the stock market and get rich.
He becomes very powerful. Then develops brain cancer. At one of his biomedical research centers they try something experimental on him which basically turns his brain into a computer, preserving the structure, but becoming inorganic. It nearly kills him, but he lives and becomes even more powerful. He backs up his brain in a duplicate.
While at dinner one day he is killed by a terrorist / psycho at a poetry reading. (I knew you'd like that.)
The backup brain takes over the world. Eventually it wipes out the human race and builds a space armada to take over the universe.
It does so and eventually develops ways to travel to other dimensions/universes. This goes on for a long time. Conquer and assimilate. Yeah, kind of Borg-ish.
But then finally... it becomes God. Not "a god", but God. The God. And it sees that it has to go back in time to its original universe, all powerful in our universe, but without memory.
It comes to the realization that to ever be happy it must give up being God. It goes to earth as a human and is killed by someone that he did wrong to back in the old days.
And that's all. Pretty boring. Lots of rambling and bullshit. You wouldn't like it. I'm pretty sure it's free and not too hard to find. If you don't know by now, I don't really care. I'll spare you the misery. Don't read it.