[Atria] On Valentine’s Day 1985, biologist Stacey O’Brien adopted Wesley, a baby barn owl with an injured wing who could not have survived in the wild. Over the next nineteen years, O’Brien studied Wesley’s strange habits with both a tender heart and a scientist’s eye—and provided a mice-only diet that required her to buy the rodents in bulk (28,000 over the owl’s lifetime). She watched him turn from a helpless fluff ball into an avid com­municator with whom she developed a language all their own. Eventually he became a gorgeous, gold-and-white macho adult with a heart-shaped face who preened in the mir­ror and objected to visits by any other males to “his” house. O’Brien also brings us inside Caltech’s prestigious research community, a kind of scientific Hogwarts where resident owls sometimes flew freely from office to office and eccentric, brilliant scientists were extraordinarily committed to studying and helping animals; all of them were changed by the animals they loved. As O’B