In 1997, the release of "Solid" started a new chapter in the history of U.D.O.. In the years that followed, a multitude of other Heavy Metal milestones were to follow. After now more than 25 years these classics are finally reissued. The first four albums of the series will be released - partly for the first time - on vinyl. "Holy", originally released in 1999, will be available as a limited purple vinyl.