Barrett, Tracy,  1955- <br/><br/>
The 100-year-old secret / 
 One hundred-year-old secret  Hundred-year-old secret 
by Tracy Barrett. 
 - 1st ed. 
 - New York :  Henry Holt,  c2008. 
 - 157 p. ;  22cm. 
 - The Sherlock files. .
<br/><br/> 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. 
<br/><br/> 650  Lexile. 
<br/><br/><label>ISBN: </label>9780805083408 :  $15.95 0805083405 :  $15.95 
<br/><br/><label>LCCN: </label>2007034004 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Siblings--Fiction.<br/>Mystery fiction.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>England--Fiction.
<br/><br/><label>LC Class. No.: </label>PZ7.B275355  / Hu 2008 
<br/><br/><label>Dewey Class. No.: </label>[Fic]