In an attempt to discourage homeless loitering, some cities have introduced spikes, covering flat, raised ledges to stop people from sitting or sleeping on them. So a group of London activists have created the Anti Anti Homeless Spikes project. They glue mattresses over a set of spikes, and create a comfy environment with a small library of second-hand books. Now, anyone is invited to sit, relax, and read for a while, or to spend the night.