The 3 Mistakes of My Life is the third novel written by Chetan Bhagat. The book was published in May 2008 and had an initial print run of 420,000. The novel follows the story of three friends and is based on the city of Ahmedabad in western India. This is the third best-selling novel by Chetan Bhagat.
The book follows Govind, Ishaan, and Omi. Govind tutors Ishaan's sister, Vidya, for whom Govind grows feelings.
The movie version of the novel is Kai Po Che! directed by Abhishek Kapoor starring Sushant Singh Rajput, Amit Sadh & Rajkumar Rao it was released in February 2013. The film and the book are set in Gujarat, hence the title Kai Po Che!.