Home Slickdeals Barnes & Noble 20% Off Coupon (Expires July 16, 2019). Black Friday... Slickdeals Barnes & Noble 20% Off Coupon (Expires July 16, 2019). Black Friday in July Sale. By ARCOM - 12 July 2019 134 0 SHARE Facebook Twitter Go to the deal page: Barnes & Noble 20% Off Coupon (Expires July 16, 2019). Black Friday in July Sale.