This looks promising: the REAL Foundation has gained exclusive access to the long-inaccessible and unpublished archive of Ludwig Mies van der Rohe's unbuilt Mansion House in London, and they're planning on publishing the first-ever book on the project, Mies in London.
[Mansion House Square photo-collage. Image: RIBA Collections / John Donat]
To make Mies in London happen they're going the Kickstarter route. Watch the video below to learn more about the project and head over to Kickstarter to give them lots of £.