There have been several times that I have bought an anthology like "Prime Evil" so that I could read an otherwise unreleased Stephen King or Clive Barker story, and ended up being blown away by the stories of David Morrell. Finally, K-Tel-like, everyone can enjoy these powerful, imaginative stories without having to buy a dozen other books.
While this collection does not contain all of Morrell's short fiction, it does contain all that I had read in other anthologies, most notably the powerhouse novella "Orance is for Anguish, Blue for Insanity," one of my all-time pieces of fiction, short or otherwise. I am a fan of author notes in collections, and Morrell doesn't disappoint. While he doesn't expound the way that, say, Harlan Ellison does, there are short notes before each store in addition to a Foreword and Afterword, and these add a texture to the book that I think makes your first read more enjoyable and increases the re-readability. Plus if you've already read a couple of these in anthologies it is nice to see the author's perspective instead of the anthology editor's perspective before the stories.
I read this during a particularly hot summer week and found it to be perfect for this setting...the stories are engrossing enough that I forgot about the heat, and a few times I caught a genuine bit of a chill! Anyone who enjoys dark stories or speculative fiction should give this great book a read.