Brain Maker A Complete Summary Brain Maker is a book written by David Perlmutter. The book came out last year, and in it Dr. Perlmutter explains how microorganisms, which inhabit the human body, are actually the key to solving many neurological disorders. Dr. Perlmutter thinks that microorganisms are the solution to many human neurological disorders because he saw what can happen if these microorganisms are treated right. The "key ingredient" of Perlmutter's...