The 3D Printing Handbook by 3D Hubs. If there is anything you might want to know about 3D Printing and why things are done the way they are this book will cover it. If you just click the look inside, it will be obvious this covers every detail about 3D Printing. I learned all of this by trial and error over the last 8 or so years. Now it’s all wrapped up in a neat little book. Buy it from the link and support bg3d.