+ Kieran Healy: Data Visualization: A practical introduction
+ Hadley Wickham & Garret Grolemund: R for Data Science
+ Hadley Wickham: ggplot2: elegant graphics for data analysis
+ the R Graph Gallery: ggplot2
+ Cédric Scherer: A ggplot2 Tutorial for Beautiful Plotting in R
+ Danielle Navarro: Data Visualisation in R From ggplot2 to gganimat
+ How to pick more beautiful colors for your data visualizations
+ Hans Rosling's 200 Countries, 200 Years, 4 Minutes - The Joy of Stats - BBC Four (YouTube)
+ Moving beyond P values: data analysis with estimation graphics