Allie returns with new rules in the sixth book of the acclaimed seriesAllies excited about her class field trip Sure its to a historic one-room schoolhouse built back before there was the Internet or even cell phones and Allies teacher is encouraging everyone to dress up in old timey costumes which some of Allies friends are actually doing GAH But at least she gets to ride on a bus which shes never gets to do living so close to school that she actually has to walk there every dayBut then Mrs Hunter announces that every student in Room has been assigned a buddy for the day--from Allies old th grade class at Walnut Knolls Elementary School with whom Pine Heights Elementary is pairing up for the trip And Allies buddy just happens to be her ex-best friend Mary Kay who betrayed Allie right before she moved Allie is going to have to spend a whole day sharing an old-timey desk with a big crybaby.