Yeah I recently purchased this book, and it seems to correlate pretty well with the biology topics on the DAT; I haven't actually studied from it yet so I can't attest to the quality of the writing but many other people on SDN have also said good things about this book...
This is what Schaum's Outline of Biology covers:
Part I: Fundamentals of Biology.
The Basic Structure of Science.
The Chemistry of Life: An Inorganic Perspective.
The Chemistry of Life: The Organic Level.
Part II: Biology of the Cell.
The Cellular Organization of Life.
Energy Transformations.
Photosynthesis.
Part III: Genetics and Inheritance.
The Nature of the Gene.
Cell Reproduction.
The Mechanism of Inheritance.
Control Mechanisms in Genetics.
Embryology.
Animal Reproduction.
Part IV: Plant Biology.
Basic Structure and Function in Vascular Plants.
Interactions of Vascular Plants with Their Environment.
Part V: Animal Biology.
Homeostasis: Regulation of Physiological Functions.
Animal Nutrition and the Digestive System.
The Excretory System.
The Circulatory System.
Immunology.
The Respiratory System.
Hormones the the Endocrine System.
The Nervous System.
The Musculoskeletal System: Support and Movement.
Animal Behavior.
Part VI: Evolution and Ecology.
Evolution: The Process.
Ecology.
Origin of Life.
Part VII: Biological Diversity.
The Kingdom Monera (The Prokaryotes).
The Kingdom Fungi.
The Kingdom Plantae.
The Kingdom Animalia.
The Primates.
Looks good, no?
Also, for more detailed look at the topics covered in this book, check out the following link:
http://www.amazon.ca/gp/reader/0070224056/ref=sib_dp_pt/701-4506102-0604345#reader-link