MIDDLE GRADE MYSTERY SALE! (PLUS MORE!)Only .99 May 18-22: The Mystery of Hidden Valley - amzn.com/B00HGQPC1IOnly .99 May 18-22: The Mystery of the Golden Dragons - amzn.com/B00PGUMG8IOnly .99 May 18-25: The Mystery of Adventure Island - amzn.com/B00ASAUQ0GFREE until May 31: The Mystery of Smugglers Cove - amzn.com/B008581LF2FREE until May 31: The Mystery of the Missing Money - amzn.com/B0083E6LBMFREE May 19-22: The Mystery of the Red Balloon - amzn.com/B00NA3BM10FREE May 19: 2020: Episode 3 (Post-Apocalyptic) - amzn.com/B00D19Z8PEFREE until May 20: 2020: Episode 4 (Post-Apocalyptic) - amzn.com/B00DNFER5SFREE until May 21: 2020: Episode 5 (Post-Apocalyptic) - amzn.com/B00DUYSSMUFREE until May 21: 2020: Episode 6 (Post-Apocalyptic) - amzn.com/B00EFZLZEGFREE until May 31: Last Plane out of Paris - amzn.com/B007K8DH0KFREE until May 31: The Florida Chase - amzn.com/B007UL4HHEFREE until May 31:  The MacLosers - amzn.com/B008UOTR4IFREE until May 31: Ameristocracy​ - amzn.com/B008VULZV4** Are you up for a thrilling adventure?When Joe spots a red balloon floating in the sky, he runs towards it, wanting to be the first person to grab it. But within moments of catching it, he stops and stares. There's something written on it!Why has someone written words on the balloon? Why do the children search the nearby village? And what happens when they find another balloon with more words on it?Set in 1950's Britain, this adventure story will suit people who enjoy Nancy Drew, the Hardy Boys or the Famous Five.