The Seven Sisters by Lucinda Riley

Book 1.

Maia D'Apliese and her five sisters gather together at their childhood home - a fabulous, secluded castle situated on the shores of Lake Geneva - having been told that their beloved adoptive father, the elusive billionaire they call Pa Salt, has died. Each of them is handed a tantalising clue to their true heritage - a clue which takes Maia across the world to a crumbling mansion in Rio de Janeiro in Brazil...

Good used condition.