From the introduction: About four years in the making, The Complete Species Guide is the ultimate source for species selection during character creation, featuring over 300 species and counting. Similar to FFG’s books, every species has stats, a picture, and information pertaining to their physiology, society, homeworld, and language. The CSG is incredibly comprehensive, including every official FFG species, every species from the Ultimate Alien Anthology, Unofficial Species Menagerie, Alien Anthology, Galaxy Guide 4: Alien Races, Galaxy Guide 12: Aliens-Enemies and Allies, or the New Essential Guide to Alien Species, as well as many other species.