Heres a concise book on everything you need to know about it.
Contrary to popular belief it is not poisonous, well, maybe it is, but its psychoactive. Careful cooking can render it edible and many cultures such as the Japanese pickle these as a delicacy. They are out in the woods at this time of year close by penny bun mushrooms. As with all mushrooms, leave well enough alone unless youre a seasoned expert.