I love this book, I've read and re-read it again and again and still get something new out of it each time. The prose style is very much of its time and takes getting used to for a modern reader. Having struggled initially, I now think it's so well written, not as fast-paced as a modern story might be and all the better for it - the clarity and depth of the descriptions strike a balance between the needs of a first-time reader reading for the narrative and the boat-obsessed reader who already knows the story but wants to work out exactly what the tide is doing... I loved it before getting involved in small boats and now that I've become a boat obsessive myself, I like it even more.
The little Collector's Library volumes are of beautiful quality, with fine paper and sewn bindings - and now offer a perfect alternative to the bigger Everyman's editions when you want a permanent copy.
This is a fairly disappointing volume in the series, however, because of the clumsy and simplified redrawing of some of the maps. The original book included facsimiles of Admiralty charts, and particularly important were the close-scale ones of the Frisian coast. In no other work of fiction are the maps so important: they are genuinely characters in the novel in themselves, something much more than just 'local colour'. This is after all a story of yachting and spying out a mysterious landscape, and the heroes spend a lot of time puzzling over and discussing these same charts (not in a way that slows down the story, I should add!). There is little in them that is actually redundant to the text.
There must be other reprints around that do a better job of the maps, surely!