THE DOOR INTO SUMMER
Robert A. Heinlein
Dan Davis, electronic engineer, is dumped by his venal partners and forced to take the long, cold sleep. He comes to, thirty years later, to try and trace not only his opponents, but also Ricky- the youngster- he had loved. Unable to fill in the facts which will help him find Ricky, a pushbutton again sends him backward in time and again he puts himself under- to make his "withdrawal" simultaneous with Ricky's and the time lag has been equalized... Different and diverting.