Calling all experts to suggest best ref. books!!

I believe that a resource of knowledge/skills can be just as valuable as a stockpile of food.  I am looking to build my library and am looking for suggestions of the best and most useful reference books to have for an emergency situation.  I know everyone on this forum is an expert in something!  

What are the best reference books to have on hand...medial. cooking, hunting, fishing, geography, survival, water purification...anything that would give us knowledge to survive and help others? 

 

Thanks for all your help!

 

 

 

 

 

 

My most valuable book is The Encyclopedia of Country Living: An Old Fashioned Recipe Book (Paperback)
by Carla Emery

Info from Amazon.com on it says:
Amazon.com
For twenty years people have relied on these hundreds of recipes, instructions, and morsels of invaluable practical advice on all aspects of growing and preparing food. This definitive classic on food, gardening, and self-sufficient living is a complete resource for living off the land with over 800 pages of collected wisdom from country maven, Carla Emery--how to cultivate a garden, buy land, bake bread, raise farm animals, make sausage, milk a goat, grow herbs, churn butter, catch a pig, make soap, work with bees and more. Encyclopedia of Country Living is so basic, so thorough, so reliable, it deserves a place in every home--whether in the country, the city, or somewhere in between.

From Publishers Weekly
The updated ninth edition of this compendium of food production information is the hefty result of over three decades of intelligence-gathering by Emery, whose initial encyclopedia project was designed to help newbies in the "back to the land" movement of the early 70s learn self-sufficiency. Tasks Emery covers run the gamut from the simple to the complex, and from the common to the strange, and include how to: bake bread, make seed milk, sew a cornhusk bed, dry flowers, prune kiwi vines, culture yogurt, plant beans, keep bees, build a fish pond, artificially inseminate a turkey and help a cow who's eaten nails. In chapters such as "Grasses, Grains & Canes," "Food Preservation" and "Goats, Cows & Home Dairying," Emery offers advice, recipes (including many that are vegan), folk wisdom and plenty of hard facts. Though it's definitely not aimed at them, urbanites will find the recipes and resources lists (of herb periodicals, nurseries, organizations dedicated to simple living, etc.) useful, the trivia interesting ("catsup" was originally a thick sauce made from any fruit or vegetable), and Emery's personal reflections ("Once upon a time, in the bad old ways when the Communists and the Western countries were poised on the brink of mutual nuclear annihilation...") compelling. Even readers with no plans to raise sheep, sell homemade cheese or plant millet will find this a fascinating cultural document.

The book is 864 pages - paperback