Find the right shampoo for your hair at Knowledge Bookstore. We carry a wide assortment of natural shampoos, co-washes, cleansing pudding, sulfate-free, paraben-free and volumizing shampoos. Clean and remove unwanted build-up without stripping the hair. Hydrating, sulfate-free shampoo from Knowledge Bookstore moisturizes dry, damaged, color-treated hair. Our organic, shea butter based and natural products will give you healthier, softer, shinier hair.