Reading age: 7 - 9 years old. 
 
Bonnie baby or alien invader?

Everyone loves Spike's baby brother, Ali. He's so cute even the school bullies want to babysit him. But Spike isn't so sure. Ali's poos are bright green and his soft, brown skin looks a little scaly. Yes, there's definitely something strange about Ali! And when Spike discovers a way to learn the truth, he begins to realise just how different his family really is...