ON SANTAYANA, like other titles in the Wadsworth Philosopher's Series, offers a concise, yet comprehensive, introduction to this philosopher's most important ideas. Presenting the most important insights of well over a hundred seminal philosophers in both the Eastern and Western traditions, the Wadsworth Philosophers Series--edited by Robert Talisse of Vanderbilt University--contains volumes written by scholars well-versed in each featured philosopher's major works and contributions. These titles will prove valuable in a number of ways. For students, they can be read as standalone texts or, when read alongside these philosophers' often conceptually daunting works, they can be helpful resources in identifying the key ideas. For instructors, these books are handy "refreshers." For a general audience, these titles have proven themselves to be an accessible and compelling means of engaging these philosophers' many rich thoughts.