Read "The Cosmic Computer" by H. Beam Piper online for free on Textopian. Full text with search, annotations, highlights, and AI-powered reading aids.
The alarm chimed softly beside his bed; he reached out and silenced it, and lay looking at the early sunlight in the windows, and found that he was wishing himself back in his dorm room at the University. No, back in this room, ten years ago, before any of this had started. For a while, he imagined himself thirteen years old and knowing everything he knew now, and he began mapping a campaign to establish himself as Litchfield's Juvenile Delinquent Number One, to the end that Kurt Fawzi and Dolf Kellton and the rest of them would never dream of sending him to school on Terra to find out where Merlin was.
But he couldn't even go back to yesterday afternoon in Kurt Fawzi's office and tell them the truth. All he could do was go ahead. It had seemed so easy, when he and his father had been talking on the Mall; just get a ship built, and get out to Koshchei, and open some of the shipyards and engine works there, and build a hypership. Sure; easy -- once he got started.