1. The improbable now and the challenge of time -- 2. More than one way -- 3. Open loops, closed loops and hybrids -- 4. So which should we choose? -- 5. Control for action:positive feedback -- 6. The two William Morrises -- 7. But is it science? -- 8. The mighty dead -- 9. Great sea-changes -- 10. Getting off the ground -- 11. The big switch -- 12. On Bifrost Bridge