The Complete Joy of Homebrewing
By Charlie Papazian
How to Brew
By John Palmer
Mastering Homebrew
By Randy Mosher
Radical Brewing
Randy Mosher
Speed Brewing
By Mary Izett
Yeast: The Practical Guide to Beer Fermentation
By Chris White and Jamil Zainasheff
Idiot’s Guides: Foraging
By Mark Vorderbruggen
Nature’s Garden: A Guide to Identifying, Harvesting, and Preparing Edible Wild Plants
By Samuel Thayer
The Homebrewer’s Almanac
By Marika Josephson, Aaron Kleidon, Ryan Tockstein
The Complete Mushroom Hunter: An Illustrated Guide to Finding, Harvesting, and Enjoying Wild Mushrooms
By Gary Lincoff
Mushrooms and Other Fungi of North America
By Roger Phillips
Phone Apps: There are several apps that will identify plants in photos taken by users. However, remember that many plants, as well as mushrooms, have lookalikes that may be harmful.
National Honey Board
http://www.honey.com/honey-at-home/learn-about-honey/honey-varietals/
Alcohol and Tobacco Tax and Trade Bureau
This portal leads to information and documents about brewing beer. The latest information about ingredients will appear under rulings.
Food and Drug Administration
A larger number of potential ingredients have been deemed Generally Recognized As Safe (GRAS) than are on the TTB exempt list. This can be a starting place for breweries seeking formula approval. The Food Additive Status List denotes what potential ingredients are GRAS.
On August 1, 2016, that list was available at: http://www.fda.gov/Food/IngredientsPackagingLabeling/FoodAdditivesIngredients/ucm091048.htm