The Door Into Summer

Brilliant engineer Dan Davis finds himself hoodwinked by his greedy business partners and forced to take the Long Sleep… placing him in suspended animation for 30 years. But his partners never anticipated the existence of time travel, enabling Dan to exact his revenge and alter his own future…


"Not only America's premier writer of speculative fiction, but the greatest writer of such fiction in the world." 

- Stephen King


"There is no other writer whose work has exhilarated me as often and to such an extent as Heinlein."

- Dean Koontz


"One of the most influential writers in American Literature." 

- The New York Times Book Review


"Heinlein… has the ability to see technologies just around the bend. That, combined with his outstanding skill as a writer and engineer-inventor, produces books that are often years ahead of their time."

- The Philadelphia Inquirer


"One of the grand masters of science fiction."

- The Wall Street Journal