As others have said it is a very broad field and you need to refine your search, at least in the begining, by deciding just what you plan to survive.
Are you looking to survive for a short time as in a natural disaster where you can expect help within a week or so or are you planning for some complete breakdown that will last months or years.
Either way all of the info is out there for free so don't fall for any retail fear mongers trying to sell you a survival kit.
Figure out what you need and piece it together yourself a 6 month supply of food isn't that hard to assemble and it is far cheaper to put together a good first aid kit than to buy something pre-assembled.
The military book sourced by Faceless is a good starting place.
Remember that being able to defend what you have is just as important as having something to defend. Sadly it has been proven over and over that the biggest problem with being ready is dealing with those who are not.
BTW Thanks for the link Faceless :-D