To selectively focus her attention on art in New England, Marshall has defined “art” to include “craft, prints, illustration, and photography.” She offers an equally “liberal” definition of “museum” to include artist’s homes or studios, such as the country estate of Augustus Saint-Gaudens in Cornish, New Hampshire.”But each “museum” should have a permanent collection, and that stipulation discounted many university galleries or regional art centers. The “Plus” part of the book’s title comes from addressing travelers who would enjoy an art excursion that might also include “hiking, antiquing, [or] visiting historical homes;” and so she tells readers what is nearby that might round out their museum visits. To me, this book provides relaxing summer reading or the basis for summer outings, both close to Lexington or while away in the mountains or by the sea.