To keep with the Cruising Library theme, I have another recommendation. In the day and age of electronic charts, How to Read a Nautical Chart (2nd Edition), is good companion to have on board. Nigel Calder, is well respected within the cruising community. Many of his books I have recommended because they teach novice sailors skills and are excellent guides for experienced sailors.
How to read a nautical chart has been updated to include electronic charts, but also covers paper charts too. Knowing how to read a paper chart is a vital skill to have for the simple reason that electronics can fail. It has happened to us where our computer screen went blank. We found a small saltwater leak that got onto our computer. We pulled out our chart and plotted our way to the destination.
But here is another reason for knowing how to read a paper chart; it gives you a better comparison with scale and your location than an electronic chart.
Check it out on Amazon. It’s a good price.