King of Pop Michael Jacksons letter to his former wife Lisa Marie Presley, in which the late singer had described his sleeping problems, is set to be auctioned. In the letter, Jackson had also expressed his desire to get away from business people, the Daily Mail reported. "I truly need this rest. I haven't slept literally in four days now. I need to be away from phones and business people. I must take care of my health first," Jackson wrote. The pop star also wrote that he was "crazy" for her, and ended the letter with his pet name Turd. Jackson, who was married to Presley for two-year between 1994 and 1996, died in 2009 after taking an overdose of prescription drug propofol. It is expected that the letter will fetch around $1,200 in the auction being held by the Julien's Auctions in Beverly Hills next month.