Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Engrossing, thought-provoking, and a good read.

I found The Knowledge of Water to be an absorbing blend of mystery, period history and romance; but before you write it off as a bodice-ripper, let me add that the characters are well developed and believable, and the thorny women's issues are thought-provoking and timely. The result is good, entertaining brain food.My only regret is that I read this volume before the first one in the series, The Vanished Child. Although I plan to go back and read it now, I fear Knowledge of Water gives away too many of the surprises from the first novel.