"First published in the United Kingdom in 2015 by Scholastic Children's Books"--Copyright page.
Summary:
Cassica and Shiara have grown up in Coppermouth, a dust choked town in the Outback, but now they hope to use their skills as race driver and mechanic to take on the Widowmaker, an off-road rally through some of the most dangerous places on Earth, to win fame and fortune--provided they survive the race.
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