This book continues the story of Ruth Marlowe and Rohannan Melior begun in "The Sword of Maiden's Tears", and expands it nicely. Ruth finds a portal into Melior's world and enters it, searching for the missing part of her soul which is magically bound into the Sword of Maiden's Tears, and also, the love of her life, Melior.
This time the setting is in Melior's world, and we learn that all is not sweetness and light there. New characters are introduced and are better developed than those in the first book. Familiar characters from the first book are expanded. The whole setting seems to have been better thought out, or else I just found it more interesting than the rather claustrophobic Columbia University setting in the first book.
A warning though: if you buy this book, search out and buy the third in the series, "The Cloak of Night and Daggers", if you want to know what happens, because this book has a cliffhanger ending