Garrett is the author of Hands-On Programming with R and co-author of R for Data Science and R Markdown: The Definitive Guide. He is a Data Scientist at RStudio and holds a Ph.D. in Statistics, but specializes in teaching. He has designed RStudio’s training materials for R, Shiny, R Markdown and more; and has taught at dozens of conferences, government agencies, and multi-billion dollar global companies. Garrett wrote the popular lubridate package for dates and times in R and creates the RStudio cheat sheets. If you use R yourself, you may recognize Garrett from his video courses for O’Reilly Media and (formerly) DataCamp.