TY - BOOK AU - Barrett,Tracy TI - The 100-year-old secret T2 - The Sherlock files SN - 9780312602123 (pbk.) : AV - PZ7.B275355 Hu 2010 U1 - [Fic] 22 PY - 2010///, c2008 CY - New York PB - Square Fish KW - Siblings KW - Fiction KW - sears KW - England KW - Mystery fiction N1 - Originally published: New York : Henry Holt, 2008; 650; Lexile N2 - Xena and Xander Holmes discover that Sherlock Holmes was their great-great-great grandfather when they are given his unsolved casebook, from which they attempt to solve the case of a famous missing painting ER -