PROVIDENCE, R.I. (AP) -- Brown University’s library boasts an unusual anatomy book. Tanned and polished to a smooth golden brown, its cover looks and feels no different from any other fine leather. But here’s its secret: the book is bound in human skin. A number of prestigious libraries—including Harvard University’s—have such books in their collections. While the idea of making leather from human skin seems bizarre and cruel today, it was not uncommon in centuries past, said Laura Hartman, a rare book cataloger at the National Library of Medicine in Maryland and author of a paper on the subject. An...