I just passed the exam for IREEX today! Just want to shout out that bob taits worthed every last penny. I want to give everyone the advice that it doesnt matter which text book you use. What matters is that you need to know all the knowledge and to apply it. know all the questions and know how to solve it backwards and at least 90% in the cyber exams given out. Dont even bother sitting the exam if you didnt. Most questions were about arrivals abd departure in controlled airspace, opr for weather , navigation aid requirments etc. good luck to everyone.