E-Books
Six open textbooks on R, data wrangling, ggplot2, base R visualization, SQL and Bash, free to read online.
Six open textbooks, free to read online. Written with bookdown and hosted on Rsquared Academy.
About these books
They were authored to supplement the courses at Rsquared Academy. Some are beginner friendly while others assume prior familiarity with a topic.
They began as blog posts, expanded into tutorials, and were eventually rewritten into short books with the sharp edges filed off. The style is deliberately plain — short chapters, worked examples, and the parts of the documentation people usually skip.
None of them replaces the official R documentation. If you want one place to start, Introduction to R is the one.
If these were useful, the courses behind them are at rsquaredacademy.com.