A Heinlein Trio Author:Robert A. Heinlein The stories are "The Puppet Masters" - invasion of earth;
"Double Star" - The disappearance of a well known politician from Mars and his team hiring a well known actor to "play the role" until the kidnapping was resolved.
"The Door Into Summer" - inventor is cheated by his partner and vows revenge on this betrayal".
In my opinion, Robert A. Heinlein wrote some of the most inventive science fiction during the 20th century. I have read and re-read most of his work over the past 50 years years and enjoyed most of it. These three stories are among my many favorites.