At least Once.Once I escaped from an orphanage to find Mum and Dad.Once I saved a girl called Zelda from a burning house.Once I made a Nazi with a toothache laugh.My name is Felix. This is my story.Once is the first in a series of children's novels about Felix, a Jewish orphan caught in the middle of the Holocaust, from Australian author Morris Gleitzman - author of Bumface and Boy Overboard. The next books in the series Then, Now and After are also available from Puffin.