Genetic engineering—the rearranging of bits of DNA—has helped crops survive droughts and decreased the need for pesticides. It has helped make the production of human insulin possible for people with diabetes. And many in the field are seeking even more treatments and cures for a variety of diseases. Those interested in a career in genetic engineering or just wondering more about how the process works will find lots of interesting information in this accessible text supported by informative photographs and images, enlightening sidebars, and truly fascinating fact boxes.