From the back cover:

The thwarted invasion of England by the Spanish Armada is studied here in fascinating detail. How, in a few short days, Philip II's fleet was stopped from invading England and forced into full retreat is looked at in a new and unique way. With the help of battle plans and bird's eye views of the action, leading historian Angus Konstam considers many of the intriguing questions surrounding the campaign, concluding with details of how the Armada's disastrous return voyage around Scotland and Ireland became one of the most tragic episodes in maritime history.