Okay, so you want to build an addition. You can find all kinds of texts that tell you what you should be doing. But no one wants to tell you what NOT to do because no one wants to reveal all the mistakes they have made.
W.J. Rayment is not afraid to relate his experiences and misadventures. In fact, this website is based on his book by the same name. There are 23 fun chapters covering everything you ever wanted to know about building an addition, from getting a loan to applying for permits, to framing right down to putting up the siding and doing the finished carpentry.
This site is easy to navigate. At the right, there is a dropdown menu covering all the chapters. Within each chapter are sub-headings to help you get to the information you want. If you would simply like to read through the book, just hit the "next page" link at the bottom of each page.