Detective Time (Hotdog! 19)

All aboard the Crystal Express! Hotdog, Kev and Lizzie are going on a train! They're not the only important passengers-the train is also carrying the famous Mega Diamond! But wait, someone's stolen it?! The thief must be on board! Featuring fluoro and silver cover, with two-colour illustrations inside. Themes: friendship, teamwork, trains, mystery, competition.