All That the Rain Promises, and More... is a wild mushroom identification and field guide by American mycologist David Arora and published in 1991 by Ten Speed Press in Berkeley, California.

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 useful 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?

Writing for The New York Times, critic Roger McKnight wrote that the book "is certainly the best guide to fungi, and may in fact be a long lasting masterpiece in guide writing for all subjects.