As of my last knowledge update in April 2023, I am not aware of an author named MD Amen with a notable presence or body of work in the public domain. It is possible that you may be referring to Dr. Daniel G. Amen, who is a well-known American psychiatrist, brain disorder specialist, and author. Dr. Daniel Amen is the founder of Amen Clinics and has written numerous books on brain health, including "Change Your Brain, Change Your Life," "The Daniel Plan" with co-authors Rick Warren and Mark Hyman, and "Healing ADD." His work often focuses on the use of brain SPECT imaging in the diagnosis and treatment of common mental health issues. If MD Amen is an emerging author or someone who has risen to prominence after my knowledge cutoff date or has a less widespread presence, you may need to consult current sources or provide additional information for an accurate description.