Get a copy of the idiots guide to american literature that is what I used. To be honest this didn't take much prep for me as I read constantly. There are some websites referenced in the specific exam feedback as well you can use. The exam is doable if you refresh yourself on american literature. Know the different phases and the big names (Mark Twain, Walt Whitman, Thoreau, F. Scott Fitzgerald, Emily Dickinson, Carol Sandberg), I added to the specific exam feedback shortly after I took the exam. I believe I had an Amy Tan and Norman Mailer question as well. Know who was credited with having her novel trigger the civil war, first published women, first published african american, items like that were on the exam.

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Judy -
AS - Computer Science - Andover college
BS - Mgmt Information Systems -June 08
MS - Info Systems Mgmt - Start Aug 08 - UMBC