There are so many books with flames on the cover that we just had to make a display with them.
We made a fireplace out of cardboard boxes. I followed the instructions here, but we painted the bricks on with a sponge. I also had a cardboard box the perfect size for a mantle, so I covered that with black paper.
I pulled the chairs out of another area of the library because the fireplace seemed to need it. The picture on the left does not do the book covers justice. There are so many books with fire or flames on the cover. It is easy to see from far away as well.