Amazon.com description: Product Description: Police work hard to investigate crimes. They follow the evidence and talk to witnesses. But sometimes, thats just not enough. When they need to get close to the criminals they pursue, they call on undercover officers. These special experts learn how to become a criminal to infiltrate and gather information. Its an intense job that could end in death at any second. Inside, read how officers train for this unique part of law enforcement, the dangers they face, and how their work has been so successful. Adventure, courage, talent . . . and servicethey can all be found in the stories of brave men and women who go . . . ON A MISSION. Each title in this series contains color photos, close ups of key tools and technology used on each mission, and back matter including: an index, further reading lists for books and internet resources, and a series glossary. Mason Crests editorial team has placed Key Icons to Look for throughout the books in this series in an effort to encourage library readers to build knowledge, gain awareness, explore possibilities and expand their viewpoints through our content rich non-fiction books. Key Icons are as follows: Words to Understand are shown at the front of each chapter with definitions. These words are then used in the prose throughout that chapter, and are emboldened, so that the reader is able to reference back to the definitions- building their vocabulary and enhancing their reading comprehension. Sidebars are highlighted graphics with content rich material within that allows readers to build knowledge and broaden their perspectives by weaving together additional information to provide realistic and holistic perspectives. Text Dependent Questions are placed at the end of each chapter. They challenge the readers comprehension of the chapter they have just read, while sending the