Armstrong Sisters

Five feisty sisters, each seeking in their own unique way to escape the tyranny of their scheming father. Two escape to Arabia, one has a secret life as a mathematician, one, shockingly, turns to opium, while the fifth sister simply flees the family nest.

Confusingly, the first two books in the series were originally marketed under the ‘Princes of the Desert’ banner – which became defunct when I set the last three stories in England!