Blue Crow Media are publishers in London who started out making a series of food and drink city guides, before branching out to architectural maps. Their Brutalist maps are now all the rage, covering world cities such as Boston, New York, Paris, and Berlin.
I adore these maps and I hope to get the London map soon. My last few trips to London on the Underground have involved me traipsing through the city looking for as many brutalist buildings as my legs would allow. This map is essential.