Hi, I've built couple of E-commerce websites before where I've created the design, development and integrated the website with a payment gateway. Lately I've realized that those are just small components of E-Commerce Business. The stuff like Inventory Management, Data Warehousing, Payment Gateways, Shipping etc. I would want to understand E-Commerce right from storing the products, selling it online to shipping it.

Please recommend books or blogs where I can get a clear understanding of E-Commerce? Thanks.