This Collection is the first career spanning collection of Enya's work, gracing 4CDs with 51 tracks. Featuring signature Enya favorites such as 'Orinoco Flow,' 'Only Time,' 'Caribbean Blue,' 'The Celts,' 'Book Of Days,' 'The Memory Of Trees' and much more. Also includes tracks not previously available on any domestic release such as 'Isobella,' 'Book Of Days' (Original Single Version) and 'May It Be' (Single Version). 48 page booklet features liner notes by lyricist Roma Ryan, a discography and archival photos. The 4th disc is enhanced with the previously unreleased performance of 'Silent Night'. The discs are housed in a purple-velvet covered digibook with 40 + page booklet.