Celebrate more than 25 years of Horrible Harry with the 30th book in this beloved classroom chapter book series! Catastrophe strikes Room 3B when the diamond on Miss Mackle's engagement ring disappears.

Fortunately, Harry is on the case! The third-grade talent show is coming up, and he wants to show off his skills as South School's greatest detective.

Doug, on the other hand, has no idea what to do for his act. The best friends need to find both Doug's talent "and "the teacher's diamond, or else the talent show will be a horrible disaster for everyone! A Children's Book of the Month Club Selection.


為慶祝本系列叢書已發行超過二十五年，《Horrible Harry》推出第三十集！三年 B 班有大麻煩了！瑪可老師的訂婚鑽戒不見了！

幸運的是，哈利要調查這個案件！三年級的才藝秀快到了，他想要炫耀他的才華，告訴大家他是學校裡最棒的偵探。

另一方面，道格還不知道要表演什麼。這對好朋友必須同時找到道格的才華和老師的鑽戒，否則這場才藝秀會變成所有人的大災難！本書乃美國兒童每月一書俱樂部首選好書。