On Barnes and Noble's website, they are offering the Simpsons World book, a
guide to seasons 1-20, for $22.48. This is 85-percent off the list price of
$150. I do not believe this is available in stores.
Link: http://www.barnesandnoble.com/w/simpsons-world-the-ultimate-epi
You can also use discount codes to bring the price down even lower.
This is a great guide for fans of the series.
