Amazon said on Thursday that “Go Set a Watchman,” the much-anticipated second novel by “To Kill a Mockingbird” author Harper Lee, is the most pre-ordered print title on Amazon.com since the last book in the “Harry Potter” series. The online retailer said the novel, to be published on July 14, 55 years after Lee’s classic “To Kill a Mockingbird,” was already the No. 1 best-selling book on the website. It is the most pre-ordered book on Amazon.com since J.K. Rowling’s “Harry Potter and the Deathly Hallows” in 2007 – the seventh and final novel about the British teenage boy wizard.