Magento is an e-commerce solution that runs on the Apache/MySQL/PHP platform. From a single installation you can control multiple storefronts, all of which share the customer and product information.
Using this book, which was recently released from Packt Publishing, you can learn to install and configure Magento, and add products to your online catalog using "Magento Beginner's Guide" by William Rice. This book provides guidance in the form of a step-by-step approach to building a simple, effective online store. The book covers the key features of Magento that will help you get your store up and running. It guides you through installation, configuration, populating your store with products, accepting payments, maintaining relationships with your customers, and fulfilling orders.P>
If you're creating an online store, Magenta might be right up your alley. You can read a sample chapter of this book here: http://www.packtpub.com/files/magento-sample-chapter-3-categories-and-attributes.pdf