Posted by Sabrina B. @gametimegirl The National Enquirer grabbed some details from the upcoming Joe McGinniss Sarah Palin book (out Sept. 20th). Apparently Palin had a fling with former Heat/Hornet/Laker Glen Rice while he was in college and while she was a sports reporter in Alaska, all the way back in 1987. Rice confirms it in the book. Details after the jump…