I enjoyed this far more than I expected to. It‘s definitely a boilerplate mystery but much more winks and nods were felt over anything I read with Poirot. Maybe I just relate to Miss Marple more. 😅
Should be noted though - lots of not great allusions to POC, off hand comments to LGBTQIA, and pretty clumsy with discussion of mental illness. This was published in 1964 and it shows.