Starman

"Come with me. It's better than here." "How can I?" says the doctor quietly. Then John jumps. The doctor looks out of the window. John is falling down, down, down. But the doctor can see a smile on his face.

Today, I read Starman, a book in the Oxford Bookworms series. It was written by Phillip Burrows and Mark Foster.
Bill meets a man, alone, standing on a road. His name is John and there is something strange about him. Bill calls a doctor because he thinks John has to see a doctor. After that, John disappear and there is something strange about the doctor like John.
I was scared to read this book. I did'nt know some points in it. Is John really a human? Why did he disappear? What happened to the doctor? I think John may be an alien. It was a very strange story for me.