Book excerpt: Gut Microbiome and Behavior, the latest volume in the International Review of Neurobiology series, provides a comprehensive overview of the gut microbiome on the brain and behavior, fully encapsulating the latest research in the field and defining the scope of this influence to outline potential mechanisms and possible implications. - Contains the expertise of contributors in the field who discuss the gut microbiome and its effect on the brain and behavior - Defines the scope of the influence of the gut microbiome and the potential mechanisms and implications - Charts the way forward in this frontier area of research