The Unsatisfied Traveler

A man finds a mysterious Sci-fi book and gets enraptured by it.
How to travel back in time?
Do scientists from a distant future have an answer?
The characters in the story are tridimensional beings, just like you and me. But, what happens when they tease the space-time fabric and have to deal with further dimensions?
This is a thrilling novel in which the only certainty is that the boundaries between real and unreal are uncertain.