Contact, written by Carl Sagan, is a science fiction novel that has become a bestseller on Amazon. The book tells the story of Ellie Arroway, a scientist who discovers a signal from an alien civilization. As humanity grapples with the implications of this discovery, Contact explores the challenges of establishing diplomatic relations with an extraterrestrial species. The novel delves into the complexities of communication, belief systems, and the search for meaning in the universe. With its blend of scientific accuracy and philosophical musings, Contact has captivated readers and continues to be a popular choice for those interested in alien diplomatic relations in science fiction.