New York : Orchard Books, 2004, 2001.
1st Orchard Books ed.
292 p. ; 22 cm.
Originally published: Great Britain : Scholastic, 2001.
Shortlisted for the Nestlé Smarties book prize, 2001.
As Thaniel, a wych-hunter, and Cathaline, his friend and mentor, try to rid the alleys of London's Old Quarter of the terrible creatures that infest them, their lives become entwined with that of a woman who may be either mad or possessed.