"Marks and Meaning" a new book by XPLANE founder Dave Gray

"Marks and meaning is a work in progress; an evolving exploration of visual language, visual thinking and visual work practices by the founder and Chairman of XPLANE, the visual thinking company. An unfinished work, it's a hybrid: part sketchbook, part textbook, part workbook, and continuously updated by the author, based on feedback and conversations with readers. This is version zero: the first version available to the public."