“Draw what you saw. What you only believed, write next to it.” The note hangs above the map table in Hold-1, London, and it opens volume 23.
The Map Room is the drawer under the table: 160 maps on 175 sheets, drawn in pencil on squared paper. For almost every operation a book of the series describes, there is a sheet here, from the lake house and the night train of the campaign to the sites from the Registry. On top of that come 60 template maps without a book or a year, from the tenement cellar to the restricted zone around a rift.
For the 131 new maps there are tabletop files with a grid, one for the game master and one for the players without numbers and secrets: as a Foundry VTT module and as Owlbear Rodeo packages. 200 pages, in English and German, free.