Preface : why another relativity book
1. principle of relativity
2. Combining (small) velocities
4. Combining (any) velocities
5. Simultaneous events; synchronized clocks
6. Moving clocks run slowly; moving sticks shrink
7. Looking at a moving clock
8. interval between events
11. E = Mc[superscript 2]
12. bit about general relativity
13. What makes it happen?
