Der Ruf der Drachen

From Author Wars - https://authorwars.com/publications/der-ruf-der-drachen-584689.html

Overview:

Title: Der Ruf der Drachen
Author: Irene Radford
Year: 2007
ISBN-10: 9783828990609
Publisher: Weltbild
Pages: 508
Binding: Hardcover
Type: Novel
Title Reference: Der Ruf der Drachen
Notes:
German translation of The Loneliest Magician the third book in the The Dragon Nimbus series. Title translates as The Call of the Dragon. The ISBN also appears on the 2nd book The Perfect Princess. Possibly all four books in the series carry the same ISBN. They could have been sold as a group. No printing or edition stated. No price given. The OCLC record is for one of five separate titles with the same ISBN which supports the above premise