All the pictures in this book are included in [b:Wall and Piece|114683|Wall and Piece|Banksy|https://d202m5krfqbpi5.cloudfront.net/books/1327904853s/114683.jpg|110426].
But what does Exitstencilism mean? According to urban dictionary
it is the way a dumba** spells "existentialism"! (large, sexxxy word, meaning the universe is a large mass of pointless chaos. based apon the idea that people actually care about their own pitiful reality.)