Each title introduces the concept of working animals, places their jobs in historical context, and explains how the creatures and their human partners work together and how the animals are positively affected. The books are attractive, incorporating black-and-white and color photographs. Some are archival (the picture of a parachuting therapy dog during World War II), many are current (search-and-rescue dogs in New Orleans), and plenty are simply fun (Mr. Ed taking batting practice). These books have been well-researched, especially Acting Animals , which includes creatures from recent movies such as "High School Musical." And while dogs and horses get the bulk of the attention, readers will learn, for example, how sea lions help the military and capuchin monkeys assist people with spinal injuries. However, the lack of cited sources or further-reading suggestions apart from the publisher's Web site (which is too difficult for the target audience to navigate) undermines the research credentials of these books. Still, there is plenty to enjoy about "Going to Work."