This is a commentary on the Kindle version. Good points include the contents page which allows you to navigate to each chapter. A criticism is that Jellicoe gives a number of organisational charts and tables which are scrambled in the text(but which can be seen as challenge to work out how the original text was laid out?). Charts described as being "contained in the pocket at the end of the book" unfortunately but obviously don't exist. Neither do the "plates" (illustrations) but which seem to have included depth charge explosions, an oil slick, a German mine on the surface and a "periscope of submarine travelling at slow speed", so not essential. However, if naval history is your thing, this is excellent value for £2.71. I would have been delighted to find a copy of this in a second-hand bookshop for twice the price (or more).