In the past I have read lots from this author and love the storytelling and this book is a good example.
This book involves the story of the ill fated Children's Crusade, and whilst the crusade definitely is one of the focuses of the book, the crusade itself didn't actually get started until two thirds of the way through the book. The story was really about Sylvia, and chronicled her path to involvement in the crusade. Be prepared to step back to the brutish life for most people in 1196.
The main focus of the book is also a study of religion and superstition within the early 1200's and also has incorporated in fables, most especially that of the Pied Piper of Hamelin.
Sylvia herself is a mass of contradictions. She is born a peasant, at a time when there really is no way to change your station in life. Born to a drunkard who thinks he can do anything he likes because he has been forgiven his sins by going on crusade, and an industrious woman, Sylvia is left to look after herself after her mother dies whilst she is still young. She has the voice of an angel, is a talented mimic of both people and birds. She suffers terrible abuse at the hands of her depraved father, and is then banished by the people of her town, and so she starts the journey of her life.
Along the journey, she meets up with Reinhardt, a rat catcher with a talent for charming everyone he meets, and a talented flautist. As they head for Cologne, they start a double act - Sylvia sings, Reinhart plays the flute and together they put on a show that brings them enough money and food to be able to survive on the journey.
After arriving in Cologne Sylvia causes quite the scene when she is involved in several "miracles", all of which Sylvia can explain, but in a time of great religious restrictions, once the Church says that a miracle has occurred then it is very difficult to change that perception. Coincidence and "miracles" continue and Sylvia becomes known as the Petticoat Angel.
As a character, Sylvia becomes all things to all people. To the people of Cologne she is the girl who feeds the homeless children in the morning, but in the evening she is friends with the girls in the whorehouse, learning from them all the theory of the pleasures that she can ready for the day that she has the chance to "know" a man. And yet, despite this knowledge and this background she ends up as a nun where she has the opportunity to learn chess and languages from one of the scholarly fathers and then as one of the leaders of the ill-fated Children's Crusade.
Her friends come from all walks - the young widow who teaches her about her own body and feelings , but also gets her ready for what her forthcoming transition to womanhood will be like, numerous priests, the Jewish couple who manage her career and who give her a sense of family despite the fact that at that stage in history the Jewish were considered to be the lowest of the low.
As Sylvia goes through the story she rarely exhibits any signs of imperfections , that to be honest in a way that is one of the weaknesses of the book in some ways. There are a number of times where she is nearly condemned as a demon but she is saved by the fact that she has a birthmark on her back in the shape of a fish and therefore as soon as people see that it is confirmed as another sign of her special blessing from God. The books itself is quite graphic in terms of some of the sexuality and also some of the torture scenes.