Time, clocks, and reference frames
Lorentz transformations and special relativity
The light cone
Forward time travel and the twin "paradox"
"Forward, into the past"
The arrow of time
General relativity: curved space and warped time
Wormholes and warp bubbles: beating the light barrier and possible
Time machines
Banana peels and parallel worlds
"Don't be so negative": exotic matter
"To boldly go . . ."?
Cylinders and strings
Epilogue
Appendix 1. Derivation of the Galilean velocity transformation
Appendix 2. Derivation of the Lorentz transformations
Appendix 3. Proof of the invariance of the spacetime interval
Appendix 4. Argument to show the orientation of the axes relative to the axes
Appendix 5. Time dilation via light clocks
Appendix 6. Hawking's theorem
Appendix 7. Light pipe in the Mallett time machine.