There's one essential rule of divorce warfare ... know your enemy -- So Jon Gosselin did some bonin' up about Kate in the bargain bin at Target.
Jon flipped through ex-wife Kate Gosselin's memoir "I Just Want You To Know: Letters To My Kids On Love, Faith, and Family" yesterday at a mega-store in Pennsylvania.
He, like everybody else, didn't actually buy a copy.
Jon Gosselin -- Target Practice
5/5/2010 10:45 AM PDT BY TMZ STAFF
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