Spacetime Physics, E. F. Taylor and J. A. Wheeler
A less technical book than the one cited above, and better suited as a first introduction.
The Ultimate Speed, W. Bertozzi.
An interesting and convincing demonstration of the speed limit, as seen with electrons in a linear accelerator. Video created in 1962, 37 minutes. American Journal of Physics, 32, 551-555 (1964).
Time Dilation, D. H. Frisch and J. H. Smith.
A demonstration of the time dilation of muons travelling at β=0.99. Video created in 1963, 34 minutes. American Journal of Physics, 31, 342 (1963).
In search of the "starbow": The appearance of the starfield from a relativistic spaceship,
John M. McKinley and Paul Doherty.
Delightful paper, covering many effects: doppler effect, aberration, changes in brightness, Doppler shift of blackbody radiation, shift of blackbody temperature, and change in stellar magnitudes. American Journal of Physics, 47, 309 (1979).
Yale Bright Star Catalog, Revision 5.
An extract of this data is used in the starfield simulation.
Tycho-2 Star Catalog.
An extract of this data is used in the creating diagrams regarding the starfield simulation. This data is large, and is too large to be used in the simulation itself.