Ian McKellen has played Magneto in the “X-Men” movies and Gandalf in “The Lord of the Rings,” but his latest role is a real biggie: Sherlock Holmes. Plus, Harper Lee’s “Go Set a Watchman” upends our picture of Atticus Finch, but the LA Times’ book reviewer says it shouldn’t be too surprising. And a new museum preserves the everyday artifacts of the Eastern Bloc — in Los Angeles.