Top secret

Do you think time travel will ever be possible? Will all the books and films that show time travel become a reality? How does the science work? In this...book, a mysterious figure called the Mystery Master sets you the challenge of investigating all the scientific theories surrounding time travel and encourages you to analyze the information that you have gathered. Once you have read the information in this book, you can figure out for yourselves: Is time travel possible?.

In this book, a mysterious figure called the Mystery Master sets you the challenge of investigating all the myths and sightings surrounding the legendary Yeti and encourages you to analyze the information that you have gathered.

King Arthur is a famous figure from the Dark Ages whose legend has stood the test of time. In this...book, a mysterious figure called the Mystery Master sets you the challenge of investigating all the facts and myths behind the legend of King Arthur and encourages you to analyze the information that you have gathered. Once you have read the information in this book, you can figure out for yourselves: Did King Arthur really exist?.

Provides a history of undercover police work, particularly in the United States, and looks at the preparations made before an undercover operation as well as differences between light and deep cover.

Discusses the job of undercover sky marshals, trained agents who are responsible for protecting aircraft from hijackings.

Describes the history, training, duties, and role of the United States Secret Service.

Explores the history, current status, and future of the Federal Bureau of Investigation; educational and other requirements for those entering this field; and various kinds of work performed by FBI agents.

Discusses how the CIA was created and how it functions, as well as what it takes to work for the CIA.