In 1859, eleven-year-old Nell goes to live with her aunt, Kate Warne, the first female detective for Pinkerton's National Detective Agency. Nell helps her aunt solve cases, including a mystery surrounding Abraham Lincoln, and the mystery of what happened to Nell's own father.
Chicago (Ill.) -- History -- 19th century -- Juvenile fiction.
Detective and mystery stories -- Juvenile literature.
Lincoln, Abraham, 1809-1865 -- Fiction.
Orphans -- Juvenile fiction.
Pinkerton's National Detective Agency -- Fiction.
Sex role -- Juvenile fiction.