Six editions of The Pyx, beginning with the very first paperback edition from Fawcett's Crest Books imprint. Published in 1960, its cover – the best of the lot – cautions:
A mystery this – the first edition has no such section.
The first English edition, published in 1960 by Secker & Warburg, with Elizabeth Lucy falling to her death.
Published in 1973, the first Popular Library edition draws on the movie poster. Karen Black makes a phone call, yes, but it's hardly crucial to the plot.
"The 'eerie' novel of a beautiful call girl and her deadly secret", says Best Sellers? Well, not really. Look closely and you'll see that what's quoted is nothing more than the word "eerie".
This later Popular Library edition holds keeps the one-word Best Sellers quote, while discarding Karen Black. What do we have instead? A semi-reptilian eye and a wholly-naked body, neither of which feature in the novel. By the way, Elizabeth Lucy is a redhead.
Quartet's 1974 edition introduces a cat – again, not in the novel – and replaces the pyx with a tiny locket containing a girl's photo and what appears to be an aspirin.
The only Canadian edition, published in 1991 by HarperCollins Canada. The novel has been out of print ever since.
Related post: A Penthouse Killing in Montreal