Far away, past the moon, floats Bol Nul. On that planet lives Blitz, a green space man. He lives completely alone there and he does not mind that, until a bird lands on its planet. Blitz and the little bird Tjilp become friends, but after a while, Tjilp wants to return to earth. Only then Blitz feels how lonely he is. He builds a rocket and flies to earth in search of a friend who looks like him. But is there someone on earth like Blitz?
Since 2013 six books about Blitz have been published: Blitz!, Blitz op bol Tien, Troep in de ruimte, De jacht op het monster, Dino’s in de ruimte and, most recently, De gouden poort.