How Your House Works is a great visual resource and introduction for anyone not acquainted with the workings of a house and is a great companion for more in-depth DIY guides.
Full of detailed and colorful illustrations of everything in a home, this book is organized into sections that cover specific parts of a house (plumbing, wiring, heating, cooling, appliances, windows, doors, foundations and frames), each including text along with beautiful diagrams. There are also sidebars called "Before calling for help…" with basic troubleshooting ideas that can save you money. But in the end this book helps you understand your house more than it helps maintain it. – Alessandro Nicoli de Mattos