You could use Dr. Rosenthal’s materials as a supplemental study guide, but never as a complete source since his materials are geared to the NCE and the CPCE. Dr. Rosenthal recommends you contact Dr. Linton Hutchinson at www.licensingexam.com. You can also contact Dr. Alyson M. Carr at http://www.DrAlysonCarr.com and feel free to drop my name. Keep in mind I have no financial arrangements with these experts. I have just heard great things about their materials.