Death By Water is the fifteenth book in the popular Phryne Fisher series by Australian author, Kerry Greenwood. This instalment is a version of closed room mystery, with the closed room being the First Class section of the P&O liner SS Hinemoa on a voyage from Melbourne to New Zealand. Phryne accepts an invitation from P&O to help them catch a jewel thief who has managed to boldly lift diamonds, pearls and emeralds from passengers on three separate cruises, once on a crowded dance floor. Dot goes along as a companion, but is grateful to eat in the second class dining room, which excuses her from eating with the upper classes and allows her to find out what the crew, service personnel and musicians are saying. Phryne becomes bait with a large sapphire pendant gracing her cleavage. The large and varied cast is involved in blackmail, jewel theft and revenge killing; there is talk of frozen ships and the Titanic sinking; Dot and Phryne go to a hangi, see fjords, Milford Sound and keas; the ships cat plays a pivotal role; Dot is drugged and Phryne is almost drowned. Each chapter is concluded with correspondence from or about prospective Titanic passengers, and one of these contains a clue. A clever mystery set amid 1928 luxury. Greenwood at the top of her game.