The Magic Litter Box

Jonny, along with his Siamese cat, Mister E, discovers a magical icon on his Nexus 7 tablet, an icon that when opened, allows them to time travel into the future. The Atlanta they arrive in is nothing like the one they left. It is a city made of glass because hundreds of years of drought have caused all growing things to die. All oil is gone so there are no plastic products. All mining has been depleted so there is no metal. Only sand is left out of which glass is produced and used for houses, furniture, toys, and flying cars. Mister E, strangely, has been transformed by time travel into a huge cat the size of a lion and can speak. Jonny and Mister E rescue Cindi, a young girl running from her mean stepfather. Adventure after adventure follow as the three of them try to escape mutated outlanders, her angry father, and the hated pet police before making a lifesaving time jump to ....