From Emily Calandrelli--Emmy-nominated host of Xploration Outer Space , correspondent on Bill Nye Saves the World , and graduate of MIT--comes the fifth novel in a fun illustrated chapter book series about an eight-year-old girl with a knack for science, math, and solving mysteries with technology. Third grader and inventor extraordinaire Ada Lace is on spring break. But it's just a little less relaxing than she'd imagined. Nina is beside herself...