Crowley does an extraordinary job putting together three extraordinary stories that marked the 16th Century in the Mediterranean: The siege of Rhodes, the siege of Malta, and the Battle of Lepanto. These stories, especially that of the siege of Malta, makes the book read like a novel, most enthralling and nail biting.
Although Crowley has written a very accurate and detailed account of these clashes between the Christian and Muslim worlds, one gets the impression, that he tends to minimize the role of Christian leaders, their armies and the importance of their victories, and maximizes that of the Ottoman side. For example, he doesn't give much importance to the conquest of Tunis by Emperor Charles V, while he gets to the detail with other minor Turkish exploits.
The author is notably pro Turkish throughout most of the book, presenting the Christians as more religious fanatics than the Muslims, when probably both were exactly the same. The fact that Crowley lived for a long period of his life in Istanbul may explain this and that he recreates himself longer when detailing the fascinating ottoman world. This is perfectly clear, when at the end of the book he goes through the list of mausoleums and great internments of all the ottoman main characters, while he ignores the final resting place of the Christian kings and admirals.
However, the book is fully recommendable, and anybody interesting in this period of history, and in the last of the crusades, will surely enjoy it.