One Whole and Perfect Day by Judith Clarke
Lily's dad left before she was born, her mum works long hours at the adult foster care home, her big brother has dropped out of a number of universities, and her grandparents are a bit daffy. Lily's the sensible one of the family, and seems to me either too young or too old to be 17 as the book says she is. Other than the Australian slang, the book has no sense of place and as far as I could see, no plot. NAY for me.