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Review of ‘The 100-Year-Old Secret’

The 100-Year-Old Secret is the first title in The Sherlock Files, a new mystery series created by Tracy Barrett. Middle-grade readers are introduced to Xena Holmes, 12, and her younger brother, Xander, who have a penchant for games. The siblings accompany their mother, a product tester, on a year-long stay in London. They soon find…

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