This is an admirable example of a type of book that is becoming an endangered species: the illuminated manuscript monograph. As one would expect from such a book, it covers everything about the superbly decorated Christina Psalter (Copenhagen, The Royal Library, GKS 1606, 4˚)—from date, provenance, and textual and visual analyses to patronage and interpretations for the intended reader. Although scholars have discussed various aspects of the manuscript in isolation, Vidas’s book is the first...