However, Madhubala's love-life continued to be the subject of media speculation. Mohan Deep wrote an unofficial biography of Madhubala titled "Mystery and Mystique of Madhubala", published in 1996, where he claims that Kishore Kumar regularly whipped Madhubala, who would show her lashes to Shakti Samanta. He also claimed that the versions about Madhubala's sickness and death provided by her family members did not match with those provided by Kishore Kumar's family members and the fact that Madhubala was forced to wear heavy shackles and whipped mercilessly in real life in the secret version of "Mughal-e-Azam" is proved by the fact that only a minor part of the total number of reels shot were released for public. However, the secret version of the film earned Kishore Kumar a lot of money that he earned forcing Madhubala to work as a sex slave in the secret version of the movie. Mohan Deep also questions whether Madhubala was really ill or her ailing was a fiction. The book was heavily criticised on its release by industry veterans such as Shammi Kapoor, Shakti Samanta and Paidi Jairaj.