The novel that I chose called The Railway Children written by Edith Nesbit and retold by John Escott.
This story consisted of five main character which is Father,Mother,Roberta(Bobbie),Peter and Phyllis.
An event that turn their life upside down was when Father took away by two men late in the night without saying a proper goodbye to his children and his wife.
After him gone without any news,Mother decided to temporarily move to a small white house near a railway line with her children.
In a nutshell this is why I had chosen this event as a turning point in the main character's lives.