About “At All Costs”
At All Costs is a 1997 novel by Edward Stratemeyer, part of the Super Mystery series, a 36-volume line of crossover paperbacks pairing The Hardy Boys with Nancy Drew. Earlier crossovers in the franchise include a 1970s TV series, a novelization of one of its episodes, two SuperSleuths books, Campfire Stories, and the Be-A-Detective series. (Summary adapted from Wikipedia, CC BY-SA 4.0.)