The Digital Fact book is good for learning the language of various digital science terms. It is also helpful to fill in your knowledge base with concise explanations of often used terms and more esoteric terms.
The Phantom High Speed Lineup guide is for Entertainment Industry cameras. There will be time when you need to shoot something faster and Phantom makes scientific/engineering cameras as well. For example, you want to see a golf ball at the moment a driving club touches the ball; for the transformation from a round ball to a ellipsoidal ball which happens at 20,000fps. Carmine Productions can get that camera for you.