Abraham Hannibal and the battle for the throne by Frances Somers Cocks. Set in the early 1700s, an Ethiopian Prince is kidnapped and sold as a slave to the Ottoman court.
Crusade by Elizabeth Laird. Story of two boys during the children’s crusade, one English and the other Muslim.
Seven wise Princesses. Barefoot books. Based on a medieaval Persian poem.
Stories of the Caliphs: the early rulers of Islam by Denys Johnson Davies, 2011. After the death of the Prophet Muhammad, there followed many leaders of the Muslim world who were known as Caliphs. These successors to the Prophet ruled first of all from Medina, then from Damascus and later from Baghdad, over an empire that included a large part of the world. This book includes twenty-seven stories from the lives of those first Caliphs, from the pious Umar ibn al-Khattab to the celebrated Haroun al-Rashid.
The army of lions by Qasim Najar, 1996. A mighty warrior and an evil warlord face off in the fabled lands of North Africa and Southern Spain during the medieval Muslim period.
The stone: a Persian legend of the Magi by Dianne Hofmeyr and Jude Daly, 2005 In the ancient Persian town of Saveh, astronomers discover a star that fills the sky with a fiery light. Intrigued, they search through their scrolls and come across the legend of a remarkable baby. They set off with precious gifts to honour the child, and in return he gives them a small stone.
Also worth looking for a retelling of 1001 and one Arabian nights.