I have purchased 3 other books/training material sets in my effort to master Sketchup. This for me is the best of the lot. SU has a number of subtleties that you must be aware of to make operations work as expected. Mr Lang does an excellent job of conveying those. His extensive experience in teaching SU is reflected in the material. The only shortcoming for me, was the lack of hard copy. I printed out a copy and bound it with plastic combs so it would lay flat on my desk while I worked with SU on my computer. This is a minor quibble for me given the quality of the book. Also, the embedded videos in the PDF are very useful in clearing up points that may not be clear from a text only description. Thank you Mr Lang.
As a lifelong self learner I have found finding the right book that states concepts concisely and clearly is key to speeding up the learning process. I am also a self taught woodworker. SketchUp is an invaluable tool for woodworkers and this is the best book I have found to get you up and going from a journeyman woodworkers point of view. Excellent clearly explained videos are also included in the book. I’ve been fumbling around with SketchUp for a while and this book set me straight. If you are a woodworker and want to learn SketchUp as quickly as possible this is the book to start and end with. Thank you Mr. Lang.