Currently devouring the latest book by Horatio Clare.
His last book 'Down to the Sea in Ships' was on the lives of sailors crewing container ships, and was excellent.
This book grabs you from the start, with tales of Finland, and the ice in the Bay of Bothnia. It's very nicely written, with beautiful descriptions of the icy seascapes and landscapes, mixed with the signs of climate change that are becoming increasingly apparent.
There's one obvious omission from the book: a decent map showing all the locations described so that you can get a sense for how they relate to each other, and the relative positions and distances involved.