Book excerpt: John Perry revisits the cast of characters of his classic A Dialogue on Personal Identity and Immortality in this absorbing dialogue on consciousness. Cartesian dualism, property dualism, materialism, the problem of other minds . . . Gretchen Weirob and her friends tackle these topics and more in a dialogue that exemplifies the subtleties and intricacies of philosophical reflection. Once again, Perry’s ability to use straightforward language to discuss complex issues combines with his mastery of the dialogue form. A Bibliography lists relevant further readings keyed to topics discussed in the dialogue. A helpful Glossary provides a handy reference to terms used in the dialogue and an array of clarifying examples.