The Twisted Root

I just finished listening to The Twisted Root by Anne Perry.  It is another in the series of Detective William Monk mysteries.  Two women are accused of conspiracy and murder in the deaths of a coachman and the mother of the fiancé of one of the women.   Was the older woman being blackmailed for the theft of medicines from the hospital?  Was the younger one also being blackmailed?  What was the truth about the younger woman's mysterious past?  What happened to her baby and who was the father? 

This book has a wicked and unexpected twist to the tale.