It???s inexcusable.??? Wendy Spiegel, a spokeswoman for Pearson Prentice Hall, which published both books and is one of the nation???s largest textbook publishers, called the similarities ???absolutely an aberration.??? She said that after Sept. 11, 2001, her company, like other publishers, hastily pulled textbooks that had already been revised and were lined up for printing so that the terror att