I highly recommend a trip to the Chicago Art Institute to see the new Matisse exhibit, "Radical Invention 1913-1917." It is wonderful. You can read information about the exhibition here. Below is one of my favorite works from the exhibit, "Piano Lesson," featuring his son Pierre at the piano.
By the way, I highly recommend Hilary Spurling's magnificent two-volume biography of Matisse - The Unknown Matisse: A Life of Henri Matisse: The Early Years, 1869-1908 (Knopf 1998) and Matisse the Master: A Life of Henri Matisse: The Conquest of Color, 1909-1954 (Knopf 1997).