Sketchbook Pages Sketchbook Pages #6 Duncan Geere Data-driven journalist, editor and designer. Science, technology, environment and culture. More posts by Duncan Geere. Duncan Geere 20 Apr 2020 • 1 min read Back to charts for my latest set of sketchbook pages. Lexis diagrams, area charts, a xenographic concept called treemap bars that I really like for hierarchical data, and some new approaches on stacked bars. Enjoy!