By | August 08 2012 8:54 AM

According to On The Red Carpet, Joan Rivers staged an impromptu publicity stunt to drum up sales for her new book. The 79-year-old co-host of E!'s Fashion Police was asked to leave a Burbank Costco after using a megaphone to protest the store for banning her book. Rivers' latest book "I Hate Everything ... Starting With Me" was released on June 5 and has received positive reviews.