Official Google SketchUp Blog: New SketchUp books for interior designers
"And now there are books, too! Adriana Granados is an architect and interior designer who happens to know an awful lot about SketchUp. She's written a series of mercifully short, to-the-point manuals collectively titled Google SketchUp for Interior Design & Space Planning that are available for sale online. The books are printed in full color and I think they're really helpful."