I have published a series of four books to master how to use Sketchup for Interior Design. My books are sold in Amazon in paperback and in Kindle version. If you want to buy the PDF version visit http://www.nextcad.net/sketchup-interior-design.html
You can get all the files and book resources by typing "agra" and chosing collections inside the 3d Warehouse of Sketchup. You can also type "Adriana Granados" in Models.