The Ultimate Hitchhiker’s Guide To The Galaxy is a collection of all the five books (and one short story) from Douglas Adams’ The Hitchhiker’s Guide To The Galaxy trilogy.Summary Of The BookThe Ultimate Hitchhiker’s Guide To The Galaxy is a compilation of five books and one short story written by Douglas Adams. The five books originally belong to The Hitchhiker’s Guide To The Galaxy, a collection deliberately termed as a trilogy by the author.The books in the collection detail the adventures of five main characters, the first of them being an Englishman named Arthur Dent. He is the only survivor after the destruction of Planet Earth by the alien race of Vogons. The remaining four characters include an alien named Ford Prefect, a depressed robot called Marvin the Paranoid Android, Ford’s cousin Zaphod Beeblebrox, and a woman named Trillian.In The Hitchhiker’s Guide To The Galaxy, the first book in the collection, the characters visit Magrathea, where they learn that a computer named Deep Thought made a prediction regarding a certain important question. This leads a couple of super-intelligent beings to formulate a secret plan of action to dissect Arthur’s brain. The protagonists are forced to make a decision - the decision to escape.In the second book, The Restaurant At The End Of The Universe, Zaphod discovers that he is part of a conspiracy to find out who actually runs the universe. Meanwhile, Arthur and Ford find themselves stranded on prehistoric Earth.In the third book, Life, The Universe And Everything, Arthur and Ford encounter a character named Slartibartfast, who requests them to help prevent a galactic war to avoid the destruction of life in the universe.In So Long, And Thanks For All The Fish, Arthur returns to his home planet Earth and falls in love with a girl name Fenchurch. He also discovers that Earth is but a replacement provided by the dolphins as part of their ‘Save The Humans’ campaign.In the fifth book titled Mostly Harmless, the Vogo