This is the first book on how to create websites based on R Markdown. It makes it much easier to publish data analysis results and R computing/graphics output through websites. The book can be particularly useful to bloggers, and also generally useful to anyone who wants to create a professional personal website. "The book blogdown: Creating Websites with R Markdown is an excellent read for beginners and advanced users alike. The target audience is R (R Core Team 2018) users of any level interested in creating a website. The book focuses on the R package blogdown (Xie 2018), explaining from beginning to end how to build and publish a website from the comfort of your R console. The name "blogdown" is a play on the word "Markdown," a markup language with plain text syntax, essentially a way to render HTML from an easy to read, plain text document . . . making it easy for statisticians and R practitioners to share their work directly from the comfort of their R console. I applaud the authors for this excellent contribution to the literature." ~ American Statistician