"As a story-teller he has reached the highest mark yet registered. As a work devised solely for the entertainment of its readers, 'The Great Secret' is a big success...The mystery begins on the very first page." - Baltimore Sun.
- ISBN10 3732682986
- ISBN13 9783732682980
- Publish Date 23 May 2018 (first published 10 April 2001)
- Publish Status Active
- Imprint Outlook Verlag
- Format Hardcover
- Pages 254
- Language English