I did a little poking around and have come to the conclusion there is no Aperture Certificaion Level Two yet. Is this correct? If yes what materials you recomend to get prepped? If no, is there an Aperture 3 advanced book?
There's never been a Level 2 certification for any version of Aperture. The only other certification for Aperture is the Trainer Certification, and it teaches you how to teach the book you used for the Pro Certification.