After a seven-year hiatus brought on by poor health, Heinlein produced five new novels in the period from 1980 (The Number of the Beast) to 1987 (To Sail Beyond the Sunset).
Po sedemročnom boji s rôznymi chorobami napísal Heinlein niekoľko románov v období od roku 1980 (The Number of the Beast) do roku 1987 (To Sail Beyond the Sunset).