Request #449 From Ellie

I’ve been trying to remember this for years. I’m assuming it was YA, read in 2008/2009. Did not seem to be a ‘classic’, so maybe only published in 1990’s-2008. I remember little about the plot, but there was a young girl who interacted with street performers in London (especially human statue types). The cover was black with a cracked/crumbling stone face on the front. Plot may have had something to do with magic but I’m unsure on that.