The book has twelve chapters arranged in three parts. Part I (Chapters 1–4) covers the Big Bang, the early development of the Universe, and how these topics relate to the Eternal Inflation Multiverse (Level II in the Tegmark hierarchy of Multiverses). Part II (Chapters 5–9) covers M-Theory and the Everett interpretation of Quantum Mechanics (Level III Multiverse). It also discusses how future technology will enable the creation of wormholes. Part III discusses the Big Freeze and how a Hyperspace wormhole (one in 11-dimensional Hyperspace rather than 3-dimensional normal space) will enable civilization and life to escape to a younger Universe.