Adam Woog 
Careers in the Secret Service [PDF ebook] 

While the Secret Service is thought of synonymously with the President of the U.S., only one agent has ever died in the line of duty protecting a President. Private Leslie Coffelt was killed during his duty of protection of President Harry Truman. Readers will learn that there is a rich, varied history of the Secret Service, and that there are several different positions within the service. They will learn about the education, training, and equipment that candidates would need for different roles. Fascinating personal stories are shared as well, giving readers an up-close look at life in the service.