A first aid/gardening/cooking/parenting/emergency preparedness/fishing/backpacking/joke book. Basically everything you would ever need to deal with untoward situations at home or in the woods with step by step directions, advice, lists of things to have on hand, etc. etc.
Know a good soup recipe that cooks well over an open fire? Know the best way to deal with splinters in the finger of your 5 year old? Not sure which corner of the house to go to in case of a tornado? Need a good joke to tell folks after a scary situation? Know how to remove a kids loose tooth? Have a good recipe for rabbit? Want to know what to do after falling in icy water? Interested in solar energy but don't know where to start? Interested in the best snow shovel? best bicycle? Well, my book will be a compendium of useful knowledge in an easy to read format.
I'm thinking about putting this together, maybe even throwing in a few short stories so people would have something to read during power outages with no TV, and some game ideas for how to entertain your kids during those big summer thunderstorms.