Amulet Book Four The Last Council by Kazu Kibuishi
Stonekeeper Emily has arrived at the ancient, fabled floating city of Cielis. Her group wants to enlist anyone left in the Guardian Council, the Stonekeepers dedicated to ruling the planet. Unfortunately, things are not as they planned. Emily is drawn into a competition for a spot on the Council, which means a fight to the death with other young Stonekeepers. Meanwhile, her family and friends discover the city is gripped with fear and on the verge of falling apart. Luckily a new ally is coming, so there might be some help on the horizon.
The story's mythology grows by leaps and bounds in this book, which I find delightful. The competition does have a Hunger Games feel to it but is so steeped in the Stonekeeper mythology that its only slightly derivative. I'm enjoying the book a lot and am looking forward to the next volume.