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A contest at Thrill Kingdom should be all loops, laughs, and roller-coaster ideas, until someone ruins Phil’s entry.
Frank and Joe Hardy are thrilled when their friend Phil enters the amusement park’s ride-design contest. The prize is free park passes for the winner and two friends, which sounds perfect for the Hardy brothers. But on judging day, Phil’s carefully made roller coaster design is wrecked, even though it was supposed to be safe in a locked room.
Now Frank and Joe have to follow the twists and turns of the case. With a fun amusement-park setting and a locked-room puzzle, this chapter-book mystery keeps young readers watching every clue.
6-8 Years
9-12 Years
112 Pages
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