Xander often thinks his sister Bonnie must be an alien. The rest of the family are musos. Bonnie is a total science geek. But when the creek rises and their whole street is cut off at Christmas, it’s Bonnie’s science experiment that saves the day. This reader is classified as Reading Level 30++ / Fountas and Pinnell Level W-Y. Visit our Levelled readers page for further information on reading levels.