Title: What It Means to Be Green, Author: Nigel A. Bernard
Title: Charlie Lupton's Sherpa Adventure, Author: Nigel a. Bernard
Title: Charlie Lupton and the Hi-Tech Kid, Author: Nigel A. Bernard
Title: The Osprey Enigma, Author: Nigel A. Bernard
Title: Charlie Lupton and the Orchid Princess, Author: Nigel A. Bernard
Title: Charlie Lupton and the Cavalier's Treasure, Author: Nigel a. Bernard
Title: The Bridge of Terror, Author: Nigel A. Bernard
Title: Last Flight to Lukla, Author: Nigel A. Bernard
Title: Charlie Lupton and the Secret Satellite, Author: Nigel A. Bernard