Read this book in 2013, and its the 2nd volume of this wonderful "Saxon" trilogy.
In this tale Sigwulf, a Saxon prince exiled to the court of the Frankish King Carolus, is summoned by Alcuin of York.
King Carolus has received marvellous gifts from the Caliph of Bagdad, and in return Carolus wants to send back presents that are equally sensational, and Sigwulf after having proved himself in Spain as a Royal Agent, King Carolus wants him to find these rare gifts.
After having seen a picture of a unicorn in the book of beasts, Sigwulf is sent into the high North to find this rare animal, and others like gyrfalcons and two white polar bears, so that they will impress the Caliph of Bagdad, but Sigwulf soon finds out that some can be found and captured but others are not to be found, simply due to the fact that they don't exist.
When they finally set out with their menagerie for Bagdad, they will encounter a journey full with danger and death, all in an effort to wreck Sigwulf's important mission for King Carolus.
What is to follow is an amazing historical Saxon adventure, in which Sigwulf is portrayed in a very lifelike and human fashion, and the surroundings and atmosphere of this period of history, late 8th Century, all this is brought to us by the author in his own remarkable and memorable way.
Highly recommended, for this is another terrific addition to this superb "Saxon" trilogy, and that's why I like to call this episode: "A Fascinating Emperor's Elephant"!