I don't know if the first edition was so badly proof read, but this facsimile has three versions of Miss Marple's name in just a few pages. It's otherwise a very nice edition. These little hard cover editions are perfect in the the hand, unlike giant modern ones.
This isn't the best, or cleverest, Miss Marple I've read, but it's not bad. It's unusual because the setting is a boys' institution, or at least the mansion attached to it where the 'visionary' who runs the place lives. For once, Miss Marple very nearly gets mixed up with the common people.
And for once, I guessed the whole thing long before the end. For me, there are a few too many dead bodies, and the denoument is rather unsatisfying.
But, it's pretty much as well written as usual, and it holds your interest well.
This one's not set in St Mary Mead, so Miss M is a little out of her environment. Really, she takes a back seat and it's only by chance that she guesses what really happened when another character also guesses.