"The Case of the Missing Marquess" by Nancy Springer

Eva from Coffee, Classics, and Craziness recommended this series to me because she knows I love Sherlock Holmes and good middle-grade fiction.  Thanks, Eva!  This was a fun, fast read.

Enola Holmes is the much, much, much younger sister of Sherlock and Mycroft Holmes.  While they're off pursuing their adult lives in London, she's growing up footloose and free in the country.  Or she was.  Their mother disappears on Enola's fourteenth birthday, and none of the Holmes si...