He was halfway through designing The League of Extraordinary Gentlemen: Black Dossier at the time of his death.

Black Dossier can refer to:

In the Black Dossier, the alternate history of the League's United Kingdom is explored in depth.

The Black Dossier is filled with non-comic pieces, taking the form of prose stories, letters, maps, guidebooks, magazines and even a lost Shakespeare folio.

A third volume entitled The Black Dossier was set in the 1950s.

In 2008, the guide to The League of Extraordinary Gentlemen: Black Dossier was released.

Time also listed Black Dossier as the second best comic of 2007.

The wishing-chair is briefly seen at the end of The Black Dossier by Alan Moore.

Black Dossier was released on November 14, 2007.

Wanting to do a source book for the League of Extraordinary Gentlemen Moore began writing the Black Dossier.