To my knowledge there are only two English books on this topic. The other is entitled, In Search of the Pied Piper, by Radu Florescu. Dr. Mieder's book is a tremendous reference for this topic. It is well written and gives a comprehensive analysis of this wonderful folktale. Everything you would want to know about the Pied Piper of Hamelin is included in this book. There is bad news. The book costs between $40.00 - $55.00! This is unfortunate and insures its limited circulation. It would be nice if it was introduced in paperback. I'm sure its' steep price has to do with it being a part of the Greenwood Folklore Handbook series. I purchased this book, but only because of research I am doing concerning the Pied Piper for a musical. I first read it through the inter-library loan system.