Osprey Publishing is well known for its softbound, mid-length book (80 to 100 pages) covering a specific topic. This book stands on its own category, with over 300 pages and hardbound. It speaks quality all around, down to its dust cover.
And the quality does not stop at the book binding, this is a carefully and thoughtfully researched book on a military operation that never was: Sea Lion, the invasion of Great Britain.
While the Battle of Britain has been covered in multiple books and encyclopedias, the number of books on the Operation Sea Lion is limited, in comparison. If you only want to read one book on this topic this is the one.