Robert A Heinlein's Double Star is a Hugo award winning classic science fiction from the 1950's. In this future, Mars is inhabited by an intelligent, but distinctly non-humanoid race. With travel between Mars and Earth possible, trade has begun. One political party wants to capitalize on closer relations and plans to use the acceptance of a prominent political figure by the Martians as an opportunity to change the balance of power, but their leader is kidnapped to prevent the event. Enter Lorenzo, an accomplished actor, but not quite a megastar. He agrees to act the part, but as events unfold he must continue reprising his role in ever more delicate situations as he gradually becomes accustomed to this new identity. Both his instincts and acting skills carry the day.
Heinlein spends little time on the Martian aliens except for their strange appearance and bizarre customs. Hypnosis along with extensive video assist in pulling off the deception. There is also a monarchy ruling over all of Earth with a political system similar to the United Kingdom. Heinlein also posits a sophisticated political apparatus that operates under the radar screen as well as a prominent fourth estate that is easily manipulated. While much of the sci-fi of this era was focused on space travel and aliens, Heinlein managed to create a story with political and societal relevance that remains timeless.