NOTE: The book is only available in Danish
This is the first book to feature the story of Niklas Walentin. Niklas Walentin's life is described in this book by the Danish Professor Mogens Wenzel Andreasen, among many of the greatest musical personalities that has excisted. From composers as W. A. Mozart and D. Schostakovtich, to famous violinist as Anne-Sophie Mutter and Hillary Hahn.
The book is available here