Marley Z and the Bloodstained Violin

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…