This is the first of the Wallace stories which were extremely popular at the time. If they're all up to this standard, then their re-release is long overdue.
We also have a review of [[The Devil's Cocktail by Alexander Wilson]].
If you enjoyed the crime fiction of the era, [[The Crime at Black Dudley by Margery Allingham|Campion]] being a case in point, or more so if you followed [[The Thirty-nine Steps by John Buchan|Hannay's adventures]] beyond The 39 Steps, then you'll love this. I'm now off to read book 2.