Shock Waves is one of the earliest Nancy Drew/Hardy Boys crossover stories, but the stock structures of the books are already settled: Joe acts impulsively but cares deeply underneath his flippant exterior; Nancy and Frank are more cautious, both about their cases and about their attraction to each other; together, all three rush about being the crackerjack teen detectives they are. There is a lot of action in this story -- car crashes and dead bodies and red herrings, oh my! -- and it's a jolly fun, solid entry in the series. ( )