MORE in Anthropology (green room), Biography (gold room - lots of 19th century authors, but also Kerouac and the Leakeys and more), Native American Studies (blue room), and Poetry (on your right as you come through the front door).

And yes, we have several books by Peter Matthiesen, both fiction and nonfiction.

Also, for the incipient philosophical jokester in your life, chicken-and-egg matrushkas (safe for thinkers age 6mo+)