The Door into Summer

The Door into Summer
Amazon

Electronics engineer Dan Davis has finally made the invention of a lifetime: a household robot with
extraordinary abilities, destined to dramatically change the landscape of everyday routine. Then, with
wild success just within reach, Dan’s greedy partner and greedier fianc’e trick him into taking the
long sleep — suspended animation for thirty years. They never imagine that the future time in which
Dan will awaken has mastered time travel, giving him a way to get back to them–and at them…