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New York : Henry Holt and Co., 2008.
157 p. : ill., map ; 22 cm.
The Sherlock files ; 1
Barrett, Tracy, 1955- Sherlock files ; 1.
A Junior Library Guild selection
Xena and Xander Holmes, an American brother and sister living in London for a year, discover that Sherlock Holmes was their great-great-great grandfather when they are inducted into the Society for the Preservation of Famous Detectives and given his unsolved casebook, from which they attempt to solve the case of a famous missing painting.