I decided to go ahead and buy The Resilient Gardener, and I believe it's one of those books that every gardener interested in even a minimal amount of food self-sufficiency should acquire. The author is gluten intolerant and considers that a reason to become a resilient gardener, and in her intro in the book talks about the many different kinds of disasters and emergencies, large and small, that make gardening resiliency important. She describes how her garden sustained her while she was taking care of a ill parent, and how her garden also suffered when she couldn't attend to it regularly, all of which informed her study into methods of gardening that don't rely on electric timers for watering, or public water supplies, or a lot of time and effort.
Check it out. Book very much worth adding to your library.