Most lists of classic literature will cover poetry, plays and novels by the most famous exponents of these forms. But this classic literature list will look at things slightly differently because it will only consider popular writers who crossed into different forms of writing.
William Shakespeare is perhaps the most famous writer in the English language. He is known as the creator of tragedies like Hamlet and Romeo and Juliet as well as comedies like Much Ado About Nothing and histories like Henry V. But he also wrote poems. Shakespeare's Sonnets collects 154 poems and is sold across the world.
Edgar Allan Poe is another writer who worked in different literary forms. He is known as a writer of gothic short stories but he was also a novelist and poet. In addition he pioneered the detective genre, which would later be popularized by Sir Arthur Conan Doyle's Sherlock Holmes. Poe's poetry and short stories can be found collected in one volume and his only novel, The Narrative of Arthur Gordon Pym, remains in print. All of his work is in the public domain, so different editions by various publishers can be found on book shelves.