I have my own similar book in the works. Seems like every 4th prepper does.
Well, I have learned that "in the works" is a LONG way from "in the can". Also, I've looked at all the survival-related books sold on Amazon and have not found one that goes to anything near the degree of detail I'm providing.
Yesterday I bought my ISBN number ... so it won't be long. If I don't sell a copy I'll just be happy to be through burning the midnight oil every night.