The Mystery of Edwin Drood: Premium Edition (Unabridged and Illustrated) [Optimized for Nook and Sony-compatible]
Other thoughts/reviews:The Guardian: http://www.guardian.co.uk/books/2012/jan/04/mystery-edwin-drood-dickens-bbc
Wuthering Expectations: http://wutheringexpectations.blogspot.be/2012/08/the-mystery-in-mystery-of-edwin-drood.html
Read in a Single Sitting: http://www.readinasinglesitting.com/2012/11/21/on-spoilers-and-the-mystery-of-edwin-drood-by-charles-dickens/
Books to the Ceiling: http://robertarood.wordpress.com/2012/02/20/the-mystery-of-edwin-drood-by-chares-dickens-a-book-discussion/