After tangling with the deadly basilisk, Nathaniel Fludd is glad to return to England with his Aunt Phil. But someone has ransacked their home, and their best suspect is the sinister man who's been trying to steal the Book of Beasts.

Before Nate and Aunt Phil can find the culprit, they are called to Welsh countryside. The wyverns (giant dragons) are in an uproar. Could the same man who ransacked the Fludd house be behind the rift with the wyverns? And just what does he want with The Book of Beasts? But before Nate can solve that mystery, he must calm the dragons before it's too late....

Is there no rest for the travel worn and weary? Not if you are Nathaniel Fludd, world s youngest beastologist-in-training. All Nate really wants is to track down his missing parents, but when a unicorn falls mysteriously ill, Nate s Aunt Phil makes it clear where beastologists duties lie: with the beasts who need them.
If ministering to the creatures of the world isn t difficult enough, Nate and Aunt Phil must also keep them safe from a villainous man. Will Nate ever find the parents he is so absolutely convinced are alive?"