Reading further of Buffy's list, it does seem that I own or have read a large number of them - that would explain why I am so damaged and left-wing in my views?! But seriously, reading the ALA's lists for the period 1990-2000, its actually quite scary what people will complain about.
The Adventures of Huckleberry Finn by Mark Twain
A Wrinkle in Time by Madeleine L'Engle (I remember reading that as a child
and wonder why I don't still have it...)
Native Son by Richard Wright
The House of Spirits by Isabel Allende
Beloved by Toni Morrison
The Handmaid's Tale by Margaret Atwood
Of Mice and Men by John Steinbeck
Have a look at the list yourself...