'Five Little Pigs' is a typical title for an Agatha Christie novel, as she had a penchant for borrowing nursery rhymes. Plotwise, it's a watertight story, but not as taut as usual. This can be put down to it being a cold case which, as other reviewers have noted, goes over the same ground several times, according to the varied perspectives of the protagonists. When interviewed by Poirot, they seem blase for the most part because they don't expect his interest in the case to throw up anything new. Consequently, there is an absence of tension. As a puzzle then, it might appeal more to a Rubik's Cube enthusiast than a lover of crime fiction.