I just saw Luzinterruptus's January 5th installation around Madrid, Acomodate y Lee, on Art MoCo and spent more time looking at the photos on their blog. Each installation consisted of a blue light, most (all?) with antique lampshades, and a book on a string. They were little reading nooks carved out all over the city. The reading nooks were installed in niches as odd as a condom machine, or as clear as next to homeless person's bedroll on the sidewalk.
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A very interesting intervention. I'm always drawn to private space insertions into public space or transformation of public space into private. This is a fairly well thought out one. Their other work is equally competent and alluring. Check it out on their blog.