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I recommend packing a copy of Hotel New Hampshire by John Irving. This warped tale of taxidermy, incest, and international espionage will keep you entertained for hours. It's considered to be an American classic, too.
By the way, please don't be afraid to take library books on vacation with you. If your trip is extended for some unforeseen reason, you can probably avoid late fees by calling the library or renewing your books online.