Dr. Castelló is once again back in the Newly Noted column with his next addition to the Princeton Field Guides series: “Canids of the World; Wolves, Wild Dogs, Foxes, Jackals, Coyotes, and Their Relatives.” Following the same highly effective format he employed in his 2016 field guide to bovids, this new guide covers not only every species of wild canid presently inhabiting the planet but every recognized subspecies of them as well.