08/19/2010 05:42 pm ET Updated May 25, 2011

'Hills' Star Spencer Pratt To Pen Shocking Book: What Will He Say About Heidi?

The Hills villain, 26, tells exclusively that he is penning a tell-all about his relationship with ex Heidi Montag, including new details about her tormented relationship with her mother, Darlene Egelhoff.

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