Two Sisters: A Father, His Daughters, and Their Journey Into the Syrian Jihad Book by Åsne Seierstad

One morning in October 2013, nineteen-year-old Ayan Juma and her sixteen-year-old sister Leila left their family home in Oslo. Later that day they sent an email to their parents. 'Peace, God's mercy and blessings upon you, Mum and Dad ... Please do not be cross with us