My latest library search turned up an intriguing cookbook topic, fireless cookery. I assumed the books listed would be about solar cooking but I was mistaken. Fireless cookery involves bringing your dish to boiling for approximately 10 minutes, removing it from the heat and placing it into an insulated box of some sort to continue cooking on residual heat.
To learn more check out:
Cooking Without Fuel by Julia Older
Fireless Cookery by Heidi Kirschner