Last week, Old Marta had demanded they dig a new well three hundred yards north. "The old one tastes of sorrow," she'd croaked. Half the camp agreed. The other half, led by a former civil engineer named Chen, cited page 32: Water sources must be chosen based on geological stability, not emotional whims.

The guide covers building sand-charcoal filters, solar stills, and understanding boiling techniques to prevent diseases like cholera.