Smart Fiona by Mike Hollin

When Fiona Chen gets sucked into her smartphone, she discovers a brand new world. The Apps are being controlled by the ruthless Queen Darkness. With the help of her two companions, Sunita and Sharlene, Fiona must defeat Queen Darkness if she is to return to the real world. However, her charger is lost, and her phone's battery is dwindling down to zero. If the battery dies, Fiona will never be able to return to the real world. Will Fiona be smart enough when it counts the most?'
Binding: Paperback / softback