Robert Heinlein Out-Takes by MatthewsP

Question 11

Daniel Boone Davis, a pioneering roboticist, is swindled out of his own company by business partner Miles Gentry and fiancee Belle Darkin. However, he turns the tables by traveling back in time to create a rival company. Name this 1957 novel which features robot product lines such as Hired Girl, Drafting Dan, Flexible Frank, and Eager Beaver.

The Door into Summer