KHAUFNAK IMARAT (The Terrifying Building), by Ibn-e-Safi, is very thriller Urdu novel. It is the first novel of Imran Series, a best-selling Urdu spy novels series created by Pakistani writer Ibn-e-Safi. It was published in October 1955.

The story is about a terrifying building where a dead boy is found and then a story full of suspense and laughs begins. Suspense because of the cause of death and secret of the building and laughs because of Imran’s behavior which is very comic.

Captain Fiaz, Superintendent of Intelligence bureau starts to solve the case but he is always in need of Ali Imran to solve the cases and this time also Imran, with the help of his sharp mind and power of decision, solve the case and disclose Sir Jahangir, a well reputed and honored man, as an agent of enemy. Imran resolve the case of some foreign office’s very sensitive papers which were robbed by some criminal elements long time ago.