Vinyl LP pressing. The Book of Secrets is an album by Loreena McKennitt released in 1997. It reached #17 on the Billboard 200. It's single "The Mummers' Dance" was released during the winter of 1997-98, and peaked at #18 on the Billboard Hot 100, and #17 on the Modern Rock Tracks chart. The album is certified double-platinum in the United States. It has now sold more than four million copies worldwide. The Canadian singer/composer is self-managed, self-produced, and the head of her own internationally successful record label, Quinlan Road. In a recording career spanning nearly two decades, McKennitt's 'eclectic Celtic' music has won critical acclaim worldwide and gold, platinum and multi-platinum sales awards in fifteen countries across four continents.