Actually, it is three of Shakespeare's plays, called Henry VI Part 1, Henry VI Part 2 and Henry VI Part 3. They have alternate titles: "The First Part of the Contention betwixt the Famous houses of York and Lancaster" is Part 2, and "The Whole Contention between the Famous houses Lancaster and York" is Part 3, and so is "The True Tragedy of Richard Duke of York" Part 1 is supposed to be the play referred to in Philip Henslowe's notebook as "Harey VI"

No, it is classified as a 'History'.

Henry VI, part 1 Henry VI, part 2 Henry VI, part 3

Henry VI part 2

Henry VI Part 1