Author:  Cross, Gillian, Snow, Alan 
Children's, Teenage & educational
Published on 6 January 2022 by David Fickling Books in the United Kingdom as part of 'the Ollie Spark' series.

Paperback | 240 pages
128 x 198 x 23 | 214g
MACHINES, MYSTERIES AND MAYHEM - THIS MUST BE A CASE FOR OLLIE SPARK.
Ollie Spark loves mending machines and solving mysteries. But he gets more than he bargained for when fixing Aunt Caz's van throws him into a real-life spy adventure!Ollie is whisked away to a mysterious city with strange plants, an unknown language and suspicious people round every corner. With the help of Gasket, his new dog best friend, he sets off on a mission to save the city - and Aunt Caz - from disaster.
Can Ollie fix things before it's too late?!