Frederic Dannay and Manfred Lee, the authors of this and the other early Ellery Queen books, certainly enjoyed mystery. They not only invented a fictional sleuth called Ellery Queen, they also wrote the books under that pseudonym. Not content with that, this novel also has a forward by a fictional 'J.J.McC' and some additional notes by an unnamed 'editor'. You may enjoy all of this or, like me, you may find it all rather irritating and wish they would simply get on with the story.
Talking of irritating, was there ever such a provoking hero as Ellery? Pompous, arrogant and vain, he makes Lord Peter Whimsey look like a man of the people. "Scoot!" he says to a police officer, handing him some items for fingerprinting. Anyone who thinks that America has always been a classless society, in contrast to Europe's class-consciousness, should read this 1930 novel.
But is it a good tale? Well, yes, if you want a story in the classic mould. It has rather too many red herrings for my taste but I shall say no more, for fear of spoiling it.
One other complaint; the authors don't trust to the power of simple story-telling. Characters do not merely 'say' things. They 'grin broadly' - for no apparent reason - and display tobacco-stained teeth when they speak. The authors seem to think they have to embelish everything to retain the reader's interest. When the Inspector orders his men to inspect the crime scene, they do so 'grinning'. Why? Have they forgotten that the victim's poor spouse is in the room?
Having said all that, if you are a mystery fan you will want to read at least one Ellery Queen story and this is as good a one as any. One last tip: if, when you reach the final episode, you have not solved the mystery, go back over the earlier parts of the book. As the authors say, the clues are all there.