Three diamonds and a donkey - Josh Lacey

The Misfitz are in Marrakech with Ben's father and his fiancee. When
her diamond ring is stolen, the police quickly arrest a young
local boy. But is he really the thief? The Misfitz don't think so.
Searching the crowded bazaars of the fabled city for the true
culprit, they soon find themselves in deadly danger.
The third mystery in a thrilling new series from a very popular children's
author.
PRAISE for the series:
"Ben's family includes a dizzying number of stepbrothers and sisters,
and their adventures during a summer holiday in the country
involve trespassing on a sinister estate, captive monkeys and all
the features that those who love Enid Blyton will fall on with glee,
especially because it's much better written."
Amanda Craig, THE TIMES
"A light, summery read that firmly takes the young reader - of either
gender, happily - by the hand, and thrusts them deep into a
realistic and perfectly formed mystery."
BOOKBAG