I am trying to find a book series (It was of three or four books). The book covers lined up to form one large image if the books were laid side by side in order. Color was orange.

The books had multiple perspectives. It was centered around the festival of Beltane and they burned effigies of the queen. There was some element of factions/getting chosen for specific jobs. The main characters were orphans? Or non-chosen-people. I remember one person running errands for people and getting bread for prostitutes. There was a castle/palace which had fine marble for the halls I think. Farmers from surrounding areas would set up in a field outside city limits during the festival.