Subsumption. Subsumption Series, #1

Trusting an alien is hard. Figuring out which alien to trust might be impossible. Marcus Adams was supposed to be a normal college student. Instead, he's one of the chosen few in an alien-run education track preparing humanity for war. The Federation calls him special - an ideal candidate to help Earth survive the coming conflict with the rival Confederation. Now they've selected him for their most secretive program yet: a classified research Cohort that will determine how humanity is "integrated" into the galaxy.
The experiments plunge Marcus into simulated realities so convincing they blur the line between engineered experience and lived memory. Each trial pushes him further - physically, mentally, emotionally. Every choice he makes becomes data. And the Federation insists that data is the only thing standing between Earth and enslavement. Marcus wants to believe them. His best friend Jordan doesn't. As the simulations intensify, Marcus's personal life begins to fracture - his brother, his family's expectations, the future he thought he controlled slipping through his fingers.
The deeper he goes, the harder it becomes to tell where research ends and manipulation begins. With the invasion clock ticking down and the truth buried inside the very trials reshaping his mind, Marcus must answer the question no one else can:Is he humanity's greatest hope - or the Confederation's most valuable asset?Because the power to choose may be the only weapon Earth has left. And everyone wants control of him.
A recursive, metaphysical technothriller for readers who love the psychological intensity of Ender's Game and the cosmic scale of The Three-Body Problem.