The Cyclops (After the Light, #1)

Nuclear war in the twenty-first century... in a blinding flash of light, nearly six billion people lose their lives.
A hundred years later, Boran and his mother Nalea try to survive in a dry and scorching climate.
When Nalea is captured by the gang of the cruel Cyclops, eleven-year-old Boran is suddenly left to fend for himself. And that is not easy in a world where only the law of the strongest applies. In order to save his mother, Boran is drawn into an exciting battle for water, which has become very rare and precious after the Light. Fortunately, he makes a friend for life during his strange adventures.
Super exciting and flashy science fiction story with friendship in the leading role.