Tangerine by Christine Mangan

The last person Alice Shipley expected to see when she arrived in Tangier with her new husband was Lucy Mason. After the horrific accident at Bennington, the two friends - once inseparable roommates - haven't spoken in over a year. But Lucy is standing there, trying to make things right. Perhaps Alice should be happy. She has not adjusted to life in Morocco, too afraid to venture out into the bustling medinas and oppressive heat. Lucy, always fearless and independent, helps Alice emerge from her flat and explore the country. But soon a familiar feeling starts to overtake Alice - she feels controlled and stifled by Lucy at every turn. Then Alice's husband, John, goes missing, and she starts to question everything around her...