书籍介绍
Meet Max and Maddy Twist: brother and sister and budding detectives. In The Chocolate Money Mystery, Max and Maddy are called upon to help figure out who is robbing Swiss banks. In The Bursting Balloons Mystery, somebody is sabotaging a hot-air balloon race. In both books, the sinister Professor Sardine seems to be involved. But can Max and Maddy make their case?
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