`To Kill a Mockingbird` author Harper Lee sues agent over copyright issues

London: Harper Lee is suing her literary agent and others over the rights to her classic novel- To Kill a Mockingbird.

According to documents filed in a New York federal court on Friday, the 87-year-old has accused the son in-law of her former literary agent of taking advantage of her deteriorating health seven years ago and tricking her into assigning him the copyright to her only published novel, the Herald Sun reported.

Lee wants the rights in the book, which was published in 1960 and is about racial injustice, owned by Samuel Pinkus transferred to her along with any commission he earned since 2007.

More than 30 million copies of the book have been sold worldwide and it has been translated into more than 40 languages.

Lee lives in Monroeville, Alabama, the same town where she grew up and which inspired her classic novel.

She has won the Pulitzer prize for the novel, which was turned into a film starring Gregory Peck, who won an Academy Award for his role as the lawyer Atticus Finch.