In the years since its first publication, Paxinos and Franklin's the Mouse Brain in Stereotaxic Coordinates has received virtually universal acceptance in neuroscience as the authoritative source for stereotaxic coordinates and delineations. This atlas is constructed in the style of The Rat Brain in Stereotaxic Coordinates, the most cited publication in neuroscience. The completely revised and updated 4e of Paxinos and Franklin's the Mouse Brain in Stereotaxic Coordinates features high-quality color plates scanned by the renowned microscopy unit of the Allen Institute for Brain Science. Constructed by the leaders in neuroanatomical atlas development, the new edition will maintain the position of the atlas as an indispensable resource for scientists working on the mouse brain.