One of the things I love about the R programming language is the enthusiastic community of R users. There are a lot of really talented folks using R. Many of them give back to the R community by creating tutorials, guides, documentation and books for the R community.
Here's a list of cool and free R books.
- An Introduction to R
- Hands-On Programming with R
- Just Enough R
- Mastering Shiny
- R for Data Analysis
- R for Data Science (2e)
- Tidy Modeling with R
- YaRrr! The Pirate’s Guide to R
And many others at Bookdown.org!