This weeks Unshelved Book Club features science fiction and fantasy books about the development of AIs, two teens who escape an attack on the mining colony where they live, the hunt for spheres that offer enhancements to those who use them, a magical book that must be returned to those who consider it sacred, a teen considering wiping out some of his memories, maverick time travelers, a man writing a futuristic screenplay that may be all too real, and a classic Cuban science fiction novel.