2011: living in a condo (2br + den) in downtown Mpls with all my books.
2001: living in a co-op (1br) on the Upper West Side that was taken over by books (with more in 3 storage units and my parents' attic)
1991: same co-op, fewer books
1981: studio apartment on the Upper East Side with relatively few (for me) books
1971: my parents' 4br house in Scarsdale and college dorms in Cambridge MA
1961: my parents' 3br house in Queens