The Money Eaters — Ian Edwards

(It s the worst day ever for David and Briar when they move to the city. David misses the countryside and Briar hates leaving her horse behind. But there s no time to feel miserable - not when there is a baffling mystery to be solved. They team up with an enterprising Vietnamese family and a bunch of tough city kids, the Grimesville Greasers and all go Stuffle hunting)