Michael Jordan's 'To Kill a Mockingbird' Signed Book From Harper Lee Up For Sale

Michael Jordan's personalized book from famous author Harper Lee is on the market ... and his custom copy of "To Kill A Mockingbird" is going for five figures.

Harper sent Michael an autographed copy of her classic work back in 1995, when 'TKAM' was celebrating its 35th anniversary and MJ was playing basketball for the Chicago Bulls.

Michael's signed copy reads ... "To Michael Jordan - best wishes, Harper Lee."

Harper mailed a small number of autographed special edition copies to celebs she was connected with ... and the NBA superstar was among that special group.

MJ kept his signed copy in his library when he was married to Juanita Vanoy, and when they divorced in 2006 she got the book as part of their divorce settlement.

The book was ultimately purchased by a private collector ... and now it's going up for sale over at Moments In Time.