i read this book because it was recommended as one of agatha christie's best works, and i enjoy plot twists. it is well written but also very easy for me to digest, especially considering it had been a long time since i picked up a book, and i even found the antiquated vocabulary amusing. i was enjoying it right up until the last quarter, when i started to suspect it might be heading in a direction i wouldn't find satisfying. my intuition was correct; the ending featured a major rug-pull, revealing that the doctor was the murderer all along: a case of an unreliable narrator. i found it quite illogical, but perhaps i've been exposed to too many plot twists to find the end of this novel particularly surprising or interesting. i would still recommend this novel to anybody who likes murder mystery or whodunnit, despite these gripes i personally have with it.