Mysterious Traveller2013
(Mysterious traveler)
by Mal Peet
Desert guide Issa finds the baby girl Mariama after a sandstorm, and raises her as his own daughter--until a young man and his protectors come seeking a guide for their dangerous journey through the Bitter Mountains.
A mysterious stranger arrives at Issa and Mariama's doorstep, a stranger who will change both their lives for ever. The coauthor is Elspeth Graham.
— from OpenLibrary
3 editions at OpenLibrary