As much as I'd love to love this - and there's enough of vintage Twain here to enjoy - two of the three stories chronicled here are a bit too flawed for blind fanboy praise to persevere.
Included in the collection is a short note of Twain himself in which he explains that Pudd'nhead Wilson and Those Extraordinary Twins used to be one big story that got out of control and therefore had to be split up into two separate pieces, which also helps to explain exactly why they seem to lack something. The two pieces feel rushed, under-developed, and especially in Pudd'nhead Wilson there are still some editing errors and strange narrative jumps that seem to be the result of this separation. Most strikingly, the origin story of the titular character's nickname of "Pudd'nhead" (for remarking that he wished he owned half of an annoyingly barking dog so that he could kill his own half, which people found so foolish when they considered the fate of the other half that they granted him said nickname) actually seems to foreshadow the eventual fate of the twins in the markedly different other short story.
Add to that the unbelievably cardboard-villainous evil of the novel’s main voice (that of Tom Driscoll), the somewhat suspect racial second reading of nature vs. nurture (although dismissed in the introductory essay as pure speculation and probably not really meant to be understood in that manner, it still doesn’t really sit well), and – something I can’t fault Twain for – a major plot resolution twist that anyone born in the modern age of police work and crime series can guess within the span of the first few pages, and you’re left with a somewhat sub-par short story by Twain.
The other half of this cut up story (half a dog, hyuk huyk), Those Extraordinary Twins, starts off alright but turns out to be somewhat of a one trick pony and simply peters out by the end, with Twain even intervening to state that he took out part of the romantic side-plot because it was "long and sufficiently idiotic".
The real gem here is The Man That Corrupted Hadleyburg. Even though it’s the stortest one of the bunch, I found it be a sharp and hugely enjoyable moral fable.