- ISBN: 9780763649685
- ISBN: 0763649686
- Physical Description: 337 p. ; 22 cm.
- Edition: 1st U.S. ed.
- Publisher: Somerville, Mass. : Candlewick Press, 2010.
"A Mary Quinn mystery"--Jacket.
As a nearly full-fledged member of the Agency, the all-female detective unit based in Miss Scrimshaw's Academy for Girls, Mary Quinn, disguised as a poor apprentice builder, must brave the sinister underworld of Victorian London in order to unmask a murderer.
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Mystery and detectives stories.