Excellent Revit Architecture 2010 tutorial guide! I am about two-thirds through the book (skipped around a little by reading chapters 10 & 11 after reading 3) but have been very pleased with the presentation of the material. Thorough and easy to follow. If a Revit tool didn't seem to work like anticipated I could usually backtrack and find where I missed an instruction. If an error message popped up, PA usually anticipated it and explained why it popped up. PA also gave plenty of instructions on where and how to explore the software on your own to further improve or practice skills.