Eleven-year-old Cassidy has just inherited a gift from her late great-grandmother. Unfortunately, that "gift" turns out to be a summer trapped in etiquette school. What good are manners, anyway, for a girl who dreams of living life on the road as a hobo--er, "knight of the road"?   As if trying to remember to keep her elbows off the table isn't bad enough, Cassidy's best friend, Jack, suddenly seems more interested in doing chores for the new teenage girl who's moved in next door than in fishing with Cassidy down by the river. Not even her classic epic pranks seem to be saving Cassidy from having her worst summer ever. It's time to face facts: growing up stinks.   Veteran middle-grade author Sue Stauffacher returns with a cranky, pranky, laugh-out-loud tomboy heroine who might just learn the hard way that manners do matter, and that people can change.  .