You are expected to read the book Uncle Tom's Cabin by Harriet Beecher Stowe (any edition). There is no specific writing requirement; be prepare to discuss it as your AP teacher requires.
See CLASSWORK page for the Unit Outline which lists all homework assignments.
AP US History electronic textbook access code: NJMC-ST8R-Q1PK-U8IN-MVDC
Review Materials for Course Work and AP Exam Review