"Developmental Biology", seventh edition and on contemporary developmental biology is written primarily for second and final year undergraduate students of biology but will also be useful for introducing graduate students and medical students to developmental biology. In addition to exploring and synthesizing the organismal, cellular and molecular aspects of animal development, the seventh edition expands its coverage of the medical, environmental, and evolutionary aspects of developmental biology. A Vade Mecum CD-ROM (ISBN 0 87893 259 X) is included with every copy of the book. This updated version now also includes Mary Tyler's new laboratory manual, "Developmental Biology: A Guide for Experimental Study", third edition, and now in electronic (PDF) format. The website at www.devbio.com is completely updated and cross-referenced throughout the textbook. Lecturer supplements include: "Instructor's Resource CD" (ISBN 0 87893 259 3) which contains all the figures from the textbook, and 200 overhead transparencies (ISBN 0 87893 260 7).