This unusual take on the King Arthur legend takes some getting used to.
Not because Merlin is a scholar and minister instead of a wizard, but because the language is modern and rather casual in feeling.
The end result is that, instead of being caught up in the story and the period, you are constantly reminded that you are reading a book.
Arthur, never free of plots and insurrections often led by his sister Morgan, is alternately regal and whiny. Meanwhile, Merlin's assistant, a girl disguised as a boy, never seems believable.
The story itself is well told. When a nobleman and his sons are found dead at Stonehenge, and reports of plague are noted throughout the country, Merlin has his hands full. If you don't worry too much about characterization, it's a good story.