Be afraid. Be very afraid: “Enter Ghost” is a collage of ghost-scenes from Shakespeare’s plays, ranging from spine-tingling to hair-raising to downright creepy  — including Hamlet, MacBeth, Richard III,  Julius Caesar  and others  –read by members of the Rockland Shakespeare Society. Thought to be the oldest continuously active Shakespeare Society in America, the society has been celebrating   for 130 years the plays of Willliam Shakespeare, our greatest English-language playwright and poet, whose works are still accessible and relevant to our troubled times.