Requires the suspension of a degree of disbelief but a good adventure with some possibly accurate information on natural history, geography and primitive Indians. All in all, a worthwhile read.
An unlikely premise for the era, characters for whom it is hard to feel empathy, slow moving and excessively wordy. For me, at least, it held few pleasures.
It's a pleasant surprise to learn that Doyle wrote much more than Holmes and Prof Challenger. Quite well worth reading.
More good short stories from Doyle. Not earthshaking but entertaining.