John Spacey

This book preserves the fact that the speed measured from our Earth of a moving object (a spacecraft for example) cannot exceed the speed of light, c: current physics is thus not impacted!
But also, this book explains well the concept of theoretical speed which allows the theoretical speed to be able to exceed the speed of light.
And the consequences of this last point interested me a lot, especially for the feasibility of being able to make far-away travels into the Space.