Board Certification: Is there a study guide for the AQB Board Exam?

The Study Guide is sent out by the ANMCB once you register to take the exam. However, most of the content is from the Lecture Notes which are inside the Certification Portal. The Study Guide has all the notes in one place, plus some extra notes on the book the Mitochondriac Manifesto. 

Once registered, you do not have to schedule the exam right away, you have six months from the time you start the process. The Study Guide is emailed out as soon as you register. 

So to summarize: prior to registration you can study the material in the portal; after registration for the exam, the Study Guide is sent out to you by the ANMCB.