Mazhar Kaleem (Urdu: مظہر کلیم) (1942 – 2018) original name Mazhar Nawaz Khan[1] was a Pakistani novelist chiefly known in Imran Series, Urdu spy fiction[2] written within Imran Series mythos created by Ibn-e-Safi.

He was known for writing the Imran Series and had written short stories for children as well.

In "his writing career of over five decades, he has written around 600 spy fiction novels on Ibn-e-Safi Imran Series", as well as "around 5000 short stories (not confirmed) for children including the famous series of Umro Aiyyar.

His original name is Mazhar Nawaz Khan while Kaleem is his literary adoption.

Mazhar Kaleem is a contemporary of Ibn-e-Safi in writing Imran series and he just used the few principal characters but always had a different style.