The unexpected landing of a big hot air balloon and a rash of bicycle deaths involve the Bobbseys in an unusual adventure with a Can’t Park Council in New Mexico as a young detectives make new friends do campfire they meet Ginny Parsons, whose handicap proves to be an aid when one of the twins injures an arm. How to children catch an elusive band of thieves after Freddy and a friend are kidnapped or captive young mystery readers.