Have you also read Garden of the Purple Dragon and Dragon Moon also by Carole Wilkinson?
Here are some other titles I think you may enjoy:
In an interview, Carol Wilkinson said she was reading The Amulet of Samarkand and was enjoying it immensely.
The Amulet of Samarakand by Jonathon Stroud.
Nathaniel, a magician's apprentice, summons up the djinni Bartimaeus and instructs him to steal the Amulet of Samarkand from the powerful magician Simon Lovelace.
Dragon's Keep by Janet Lee Carey.
In 1145 A.D., as foretold by Merlin, fourteen-year-old Rosalind, who will be the twenty-first Pendragon Queen of Wilde Island, has much to accomplish to fulfill her destiny, while hiding from her people the dragon's claw she was born with that reflects only one of her mother's dark secrets.
The Hunting of the Last Dragon by Sherryl Jordan.
In England in 1356, as a monk records his every word, a young peasant tells of his journey with a young Chinese noblewoman to St. Alfric's Cove and the lair of a dragon.