All That the Rain Promises, and More is a wild mushroom identification and field guide by American mycologist David Arora. Published in 1991, the book includes detailed descriptions of more than 200 edible and poisonous mushroom species, as well as recipes, stories, and information on uses of various species such as for dying hair and clothing or playing games. In the preface, Arora writes:
"In leafing through these pages, you may wonder what all the 'fanciful,' 'foolish,' or (shudder) 'extraneous' material is doing in a factual guide. After all, it is the practical, hands-on, how-to-identify information that makes this book usefull and gives it substance. But I ask: is it any stranger or less desirable to sprinkle the facts with flakes of fancy than it is to liven up solemn, substantial fare like potatoes with something fancier and more flavorful, like wild mushrooms?"