StuToffee.....Do a search for Building a survival shelter here on the forums. Look in the past 6 months. I put a post there (by CJK) regarding a book. It is titled The Ultimate Do It Yourself Survival Shelter Construction Manual. The ISBN is 1-886774-02-1

You can still find it on Amazon if you enter the ISBN in the search area.

I have one and it has VERY detailed info regarding building the things. Down to supply lists.