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In his new book, Spencer Pratt is going to unleash all the truth we can handle about his failed marriage to Heidi Montag and claims that this time (how many times have there been?) hes not holding anything back." Pratt says he'll be talking about all kinds of juicy Montag-related details, including Montags mom, Darlene Egelhoff, and how upset she was at her daughter's multiple plastic surgeries. How well will it do? Hopefully better than his last tome, How to Be Famous," which, Pratt tells "Us Magazine," failed because it was in the self-help section." Click for more about esteemed author, Spencer Pratt.