"Pk" is a thought-provoking Urdu novel written by Javed Akhtar, a renowned Pakistani writer, journalist, and poet. The book was first published in 2014 and has since become a bestseller in Pakistan.
You're referring to the popular Pakistani book "Pk" by Javed Akhtar, commonly known as Jaggu Sahni. Here is some information about the book:
"Pk" received widespread critical acclaim in Pakistan and abroad, praised for its originality, wit, and thought-provoking themes. The book has been translated into several languages, including English, and has inspired a Bollywood film adaptation (2014) directed by Rajkumar Hirani.