Zeina Starborn and the Sky Whale by Hannah Durkan

When Zeina isn’t busy reading the latest on her hero adventuress, Vivianne Steele, or helping her father in the workshop, she spends her days collecting scraps to build her own inventions. All while navigating the thick smog that blankets everything. Everything – that is – except the Upper Atmosphere where the Aboves live. After all, Zeina is a Below, and Belows belong beneath the smog-line. Then Zeina wins the chance to visit the infamous Willoughby Whale Hotel floating high above and meet Vivianne Steele. Her dreams are finally coming true! Or, are they? What if everything she thought she knew about the infamous sky whale hotels was actually a terrible lie?