Very much enjoyed this information-dense book, inspiring me to create a shelf for planned rereads. The author describes a variety of interesting things about water, from tides to waves to temperature and salt layers. Also touches on wind, wildlife, ground saturation, and navigation (by signs or lights and stars). Basically a slightly scattered survey of interesting topics.

While not completely scientific, it is nonetheless thoroughly readable, and I look forward to digging into this author's other books on natural navigation.