Dr. Levy's books on health and nutrition are truly exceptional, and "Magnesium Reversing Disease" is no exception. His work tends to be more on the rigorous side and so resides at the boundary of where intelligent laypersons and medical / dietary professionals meet.
I especially like his Companion Supplements section, as it puts Magnesium supplementation in a broader supplementation regime context for those who haven't read his other books.
Doctors who aren't familiar with Levy's works should consider remedying this as a mandate of their Hippocratic Oath. This is not a hyperbolic statement.