This book contains twelve of Professor Kennedy's adventures. The interesting thing about these stories is Kennedy uses newly discovered science from his time period, which we take for granted today. The first story, The Silent Bullet, has everyone wondering how a bullet could kill someone with no noise. Today, silencers on guns are commonplace in movies and on TV. Or as in "The Deadly Tube" featuring the story of a doctor causing his patients much harm with evil x-rays, or the developmnt of the gyroscope for aeroplanes in "The Terror in the Air". Each story features a facinating look at life in the early 20th century, and even includes some action along the way. Arthur Benjamin Reeve was an American mystery writer. He is best known for creating the series character Professor Craig Kennedy, sometimes called "The American Sherlock Holmes," and his Dr Watson-like sidekick Walter Jameson, a newspaper reporter, in eighteen detective novels.