We just set up a Nitrox class for this Thursday if anyone is interested. It will be in Scottsdale starting at 7pm and will probably end around 10pm. You'll need a book and slates. We recommend you purchase a book at your LDS so you can read it and complete the knowledge reviews prior to the class. We can order slates for you Monday and bring them with to the class. Each diver will need a book. If you'd like more information about the class or materials, contact me here or call 480-620-4442.