Five Point Someone: What not to do at IIT is a 2004 novel written by Indian author Chetan Bhagat. The book has sold over a million copies worldwide. It was adapted into a play by the theatre company Evam.

The book is narrated by Hari, with some small passages by his friends Ryan and Alok, as well as a letter by Hari's girlfriend Neha Cherian. The three friends' elation on making it to one of the best engineering colleges in India is quickly deflated by the rigor and monotony of the academic work. The two main plot lines are: the numerous attempts by the trio to cope with and/or beat the system, and Hari's fling with Neha, the daughter of Prof. Cherian (the domineering head of the Mechanical Engineering department of their college). It occasionally takes some dark turns, especially as it pertains to the families of the protagonists. Most of the action, however, takes place inside the campus. The characters, led by the ever-creative Ryan, frequently lament over how the internationally lauded IIT system has stifled their creativity by forcing them to value grades more than anything else. Uninspiring teaching and numerous assignments add to their woes, though the boys do find a sympathizer in Prof Veera.

The book has been translated into Hindi and was published by Prabhat Prakash Advaniji, who has released two novels: Five Point Someone and One Night at the Call Centre. The former set a record by being purchased by 30,000 people in one month and has gone on to become a top seller in Hindi.

Amit Mishra, writer for The Last Critic, thought the book was "bereaved of all the literary juice", but "unlike his other publications like Half Girlfriend and One Indian Girl, this novel is almost flawless."

This book was made into two films, 3 Idiots in Hindi and Nanban in Tamil. The names of the characters and their attributes were changed. Also, both the films were not full adaptations of the books, as many of the scenes from the book, including the climax, were changed in the films.

Following the success of 3 Idiots in East Asian markets such as China and Hong Kong, the producer Vidhu Vinod Chopra has announced that Hong Kong film star Stephen Chow (known for comedy films such as Shaolin Soccer and Kung Fu Hustle) will be producing a Chinese remake of the film. Chopra also announced that there are plans for a Hollywood remake, and is in talks with three different American studios interested in remaking the film. Chopra stated that there is an Italian film studio also interested in remaking the film.

Five Point Someone was Bhagat's first book, written under very peculiar circumstances; in the year 2004, he was denied a promotion at Goldman Sachs, the Hong-Kong based bank where he was working. Bhagat was very depressed. Under a wave of nostalgia, as he remembered his earlier carefree times, he jotted down a few of his experiences at his college. As he added more and more experiences, the collected writings took the shape of a book.

Before the release of the film, director Rajkumar Hirani commented on the relationship between Five Point Someone and 3 Idiots: