Victor Obeck was Professor of Physical Education as well as the Athletic Director at New York University during the 1960s. Prior to his career in academia, he had been a pro football player and was well aware of the need for exercise and strength conditioning. Obeck’s first exposure to Isometric Contraction came in 1960 when he traveled to Europe for a technical meeting at the Institute of Human Anatomy at the University of Rome. The meeting coincided with the Olympic Games that were being held that year in Rome, and it was there that Obeck met a young research associate from Germany’s Max Planck Institute, who was there to discuss the volumes of validated research compiled by Drs. Mettinger and Müeller that proved beyond the shadow of a doubt that Isometric Contraction was the safest, best, and most adaptable method of super-strength building that had ever been researched. From there Obeck became a champion of Isometric Contraction and pioneered its use in sports conditioning in the United States.
A good little book that explains why and how to perform isometric workouts in as little as 5 minutes per day. It's a bit dated in style, not to mention the font, but it's an easy inspiring read. It contains enough simple but good illustrations of excercises to build your own daily workout.