Whatever I learned about the Spanish Armada in school about 50 years ago, I had long forgotten, except that it involved a naval battle between England and Spain, and that Francis Drake was a major figure in the story who played a game of bowls. Even though I don't remember anything else, I am fairly confident that I was taught a different story to the one described here, as the dust jacket notes suggest. It appears that the author carefully researched the history to find out what really happened.
Since leaving school, I had no reason to concern myself with the Armada until I learned that one of my ancestors was a sister of the Lord High Admiral (Charles Howard), commander of the English fleet with Drake as his vice-admiral, and it was Charles Howard who played Drake in that game of bowls. Unlike Drake, Howard seems to be one of the few top level people who came out of the conflict with their reputations intact. Given how evil some of my historical ancestors were, that comes as a pleasant surprise :-)
The story itself is far more interesting than I expected, although it is slow to get going initially. It is rooted in the emergence of the traditionally devoutly Catholic England as a Protestant nation, which King Philip of Spain didn't like and wanted to reverse. He decided to go to war against Queen Elizabeth (a protestant like her father), knowing that there was still plenty of support in England for Catholicism at the time. The story is bizarre because neither side could afford the war, so their navies are not properly funded.
There seems to have been only one major battle, with the rivals playing cat and mouse the rest of the time, hoping for favorable winds to give their side an advantage. The Spanish eventually realize that they can't win and escape via the North Sea, round the top of Scotland and into the Atlantic. Bad weather off the west coast of Ireland wrecks a lot of their ships.
That's not the end, as Queen Elizabeth sends a fleet to attack selected Spanish targets about a year later. This time, Norris commended the fleet with Drake as his deputy, but Drake disobeyed orders by choosing different targets to those agreed with Norris and the Queen, so the mission failed.
The author concludes with a lengthy epilogue assessing the Armada and its aftermath, concluding that the weather was a decisive factor, ending with a mention of Guy Fawkes.