Metabotropic Glutamate Receptors in Psychiatric and Neurological Disorders, Volume 168 in the International Review of Neurobiology series, highlights advances in the field, with this new volume presenting interesting chapters on topics such as mGlu receptors in Parkinson's disease, Metabotropic glutamate receptors in estradiol-mediated motivated behaviors in females, mGlu regulation of sleep, Implications for sleep disruptions in psychiatric disorders, Mechanisms of mGlu receptor trafficking; alterations by methamphetamine, Group I mGlu and cocaine seeking, The role of mGlu receptors in fear and anxiety, Regulation of Alcohol Consumption, Reward, Dependence, and Perception by Metabotropic Glutamate Receptor Signaling, and mGlu5 as a biomarker for psychiatric disorders.