Blake Crouch Collection 3 Books Set (Upgrade, Recursion, Dark Matter):

Upgrade:
At first, Logan Ramsay isnt sure if anythings different. He just feels a little . . . sharper. Better able to concentrate. Better at multitasking. Reading a bit faster, memorizing better, needing less sleep. But before long, he cant deny it: Somethings happening to his brain. To his body. Hes starting to see the world, and those around himeven those he loves mostin whole new ways.

Dark Matter:
Those are the last words Jason Dessen hears before the masked abductor knocks him unconscious. Before he awakens to find himself strapped to a gurney, surrounded by strangers in hazmat suits. Before a man Jasons never met smiles down at him and says, Welcome back, my friend. In this world hes woken up to, Jasons life is not the one he knows. His wife is not his wife. His son was never born. And Jason is not an ordinary college physics professor, but a celebrated genius who has achieved something remarkable. Something impossible.

Recursion:
At first, it looks like a disease. An epidemic that spreads through no known means, driving its victims mad with memories of a life they never lived. But the force thats sweeping the world is no pathogen. Its just the first shock wave, unleashed by a stunning discoveryand whats in jeopardy is not our minds but the very fabric of time itself. In New York City, Detective Barry Sutton is closing in on the truthand in a remote laboratory, neuroscientist Helena Smith is unaware that she alone holds the key to this mystery . . . and the tools for fighting back.