Children's LiteratureThe intent of Lucent's "Understanding the Human Body" series is to explore different systems of the human body, each in its own volume. The immune system has been one of the less well understood of those systems, and is presented here in an organized manner, notwithstanding the 21-line paragraph on the opening page. The writing is clear, and in presenting the complexity of types of cells and their functions, is well delineated with frequent bold headings. This information is critical to understanding how the immune system works in its "war against antigens" where "the body is a battleground...with passageways for troops traveling to and from the battle," the subject of chapter 2. Chapter 3 explains allergic reactions and the immune system, while chapter 4 discusses autoimmune diseases. Wrapping the book up is a chapter about vaccines and medical technologies that can help strengthen and support the immune system. Black-and-white photo captions add to the text under discussion on many pages. There is only one diagram in the book-more might have been useful to portray the enormity of this important system. While suggested book references are not timely, most published in the mid-1990s and two published in 1987, the suggested Internet sources and Web sites are child-oriented and plentiful. Book references consulted by authors are also dated, however readers will find here valuable, reputable Internet sources that include CDC, NIAID, and JAMA. A glossary and index are included. Both authors are middle/high school science teachers. A good research source for in-depth information and reports, useful to adult readers as well. 2003, Lucent Books/Gale/Thomson Learning, Ages 12 up.