Another independent bookstore is ready to turn the page. On Saturday, March 3, Patten Books(10202 Manchester Road, Kirkwood; 314-822-3200) will say goodbye to bibliophiles who have been picking out their favorite volumes for almost a quarter of a century.Shoppers will notice the large banners hanging outside the building, urging readers to take advantage of selection and discounts before the store closes for good in just over a month.…