GXPN exam comes with its own set of challenges. There are so many doubts that it becomes difficult to clear them. However, practicing on the simulators and practice questions made me aware of so many things like practicing is the right route to understand a topic better. I know more about the Crypto for Pen Testers and Manipulating the Network topics of the syllabus way better now and without visiting any kind of doubt clearing session or any kind of offline class.
GXPN Books
Use this quick start guide to collect all the information about GIAC GXPN Certification exam. This study guide provides a list of objectives and resources that will help you prepare for items on the GIAC Exploit Researcher and Advanced Penetration Tester (GXPN) exam. The Sample Questions will help you identify the type and difficulty level of the questions and the Practice Exams will make you familiar with the format and environment of an exam. You should refer this guide carefully before attempting your actual GIAC Exploit Researcher and Advanced Penetration Tester (GXPN) certification exam.