I've got to chime in on this one. The book by Dennis Fukai, "3D Construction" is excellent! It is a couple of years old, but that in no way diminishes the impact of the book. If one wants to learn Sketchup this is one of the best ways. This book not only teaches the "program, or software", but also teaches one how to approach the problem of designing and building a project. That is, the methodology is as, if not more important than knowing which tool to use to get which effect on the screen.
I also want to say that not only is the book an outstanding resource, Dennis is a prince of a man. I was having a little trouble with the videos included with the book, and so I emailed him for help. He bent over backwards to get things straightened out, (it was a combination of factors which caused the trouble, and I wouldn't have solved the problem without his help.)
regards
rollin'