A quick post so that I don't forget to add a link to a website I discovered on mushrooms, namely Rogers Mushrooms - a truly useful site for everyone interested in wild mushrooms and collection mushrooms for food.
I must admitt that I love collecting wild mushrooms, yet I am always worried about picking the wrong species and making myself (and others) ill, so I tend to stick to mushrooms that are easily identified as good for food.
Having a good book with lots of pictures does help and you can buy the Rogers Mushrooms book from Amazon - Wildlife and Nature Books aStore - Rogers Mushrooms or simply browse the section on mushrooms for many other books on the subject.