Erikson lives on Deimos, one of Mars' two moons with just his mum, his cat and some talking machines. He has never seen another kid in real life. When some criminals take over his moon he escapes down to Mars where he knows nobody and can hardly walk because of the gravity. Adopted by Magda who introduces him to Mars life and hatches the beginnings of a plan to save his moon and his mother...
Used availability for Billy Cowie's Moonking
January 2012 : USA, Canada, UK Kindle edition