Maryanne Grebenstein, consulting editor. Maryellen Weimer, consulting editor. George Stade, consulting editor. Scott Freiman, consulting editor. [Margit J. Mayer, consulting editor [Margit J. Mayer, consulting editor]. [Margit J. Mayer, consulting editor] [Jacqueline Mitton, consultant editor Tony Buzan, and James Harrison, consultant editor.