Larbalestier, Justine. Magic or madness

Larbalestier, Justine. Magic or madness. RozorBill, 2005 [1-59514-022-0]
Ever since Reason has been born, she and her mother have been on the run in , staying away from her grandmother, who her mother called a witch. When her mother goes crazy, Reason is sent to her only living releative, her grandmother. Reason is very suspicious of everything about her grandmother so from the first day, she makes plans to run away when she can. She finds a strange key which opens a door in her grandmother's house (in Sydney) to New York city. There she finds out about the magic which runs her family and the people have a choice to either use the magic and die early or go mad from using the magic. When Reason finally gets back to Australia, she understands about her mother and grandmother. This 271 page book has a glossary of Australian words. I liked this story.. it is not just about magic and/or witchcraft, but it makes you think also.