John Lewis Becomes an Honorary Gypsy

Though the Standing Stones Sagas, #3

John's witch cousin, Sybil is now drawn into the saga as she has a mysterious illness which can only be cured by gypsies and their price is that she and John go back in time to the court of Empress Theresa to remove a gypsy curse.
There is danger in 1770. John gains more Old One's magic, but can he use it to save them from the River Danube's rapids?
Sybil needs all her skills to save an ancient moonhenge or the Old Ones won't let them go home.