I love these kinds of books that explore some weird ass philosophical theory and craft an awesome sci-fi story around it ... because what if the theory is true?

Recursion explores the theory the linearity of time and how people can change it.
It's a cool read and will certainly fuck with your thoughts for a couple days :p

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When a person dies, he only appears to die. He is still very much alive in the past .  .  . All moments, past, present and future, always have existed, always will exist. It is just an illusion we have here on Earth that one moment follows another one, like beads on a string, and that once a moment is gone it is gone forever. — KURT VONNEGUT, SLAUGHTERHOUSE-FIV