Yihui Xie is a software engineer at RStudio. He earned his PhD from the Department of Statistics, Iowa State University. He has authored and co-authored several R packages, such as knitr, rmarkdown, bookdown, blogdown, and xaringan. He has published a number of books, including “Dynamic Documents with R and knitr”, “bookdown: Authoring Books and Technical Documents with R Markdown”, “blogdown: Creating Websites with R Markdown”, “R Markdown: The Definitive Guide”, and “R Markdown Cookbook.”