What makes a Cassatt a Cassatt?

“In this series from The Metropolitan Museum of Art, discover what makes one artist’s work different from any other’s. Recognizing an artist’s work may seem mysterious at first, but it can be as easy as spotting a friend’s handwriting.
In each book, the clues to identifying a famous artist’s painting – color, line, shape, composition, subject matter, and brushwork  are revealed through a lively look at twelve masterpieces.”