Functional groups and reaction mechanisms are used as organizing principles in this text. The book's primary organization is by functional group, beginning with the simple and progressing to the complex. Within this organization, the author emphasizes the fundamental mechanistic similarities of reactions. This third edition includes new problems, bringing the total number of problems to more than 1,650, and the full-colour design incorporates a new colour palette that is used pedagogically consistently in chemical formulas, in chemical structures, and in the artwork.