I read this book as a teenager at the recommendation of a neighbor, a former English teacher. The book is enthralling account of what would now be considered "special forces" in World War II secretly landing on a German controlled island in the Mediteranian, crossing the island and eventually attacking the huge in-cliff gun implacements at Navarone. On the way they encounter various problems and surprises that must be dealt with. Highly recommended for teenagers (and adults) with an interest in adventure, the military or war history.