Lisa Rienermann, 30, spent six months wandering the winding streets of picturesque Barcelona looking upwards and taking pictures of every letter of the alphabet in the spaces between buildings.
A, B, C, F, G, H, K, L, M in the sky above Barcelona
Type The Sky
The novel photos have been put into a book called 'Type the Sky'.
"I tried it in Berlin but it didn't work because the houses and streets are too far apart."
Lisa uses a Nikon d5000 to capture letters - not her best camera - but because it is her only one with a flip-out screen.
She said: 'There was a reaction two years ago on the US blogs, but within the last two weeks I have been getting a big second wave of attention."