The loaded R package versions (in the order mentioned in the chapter):
sqldf 0.4-10 (CRAN)
hflights 0.1 (CRAN)
dplyr 0.4.1 (CRAN)
data.table 1.9.4. (CRAN)
plyr 1.8.2 (CRAN)
microbenchmark 1.4-2 (CRAN)
Further reading:
The data.table manuals, vignettes and other documentation at https://github.com/Rdatatable/data.table/wiki/Getting-started
Introduction to dplyr, vignette at https://cran.rstudio.com/web/packages/dplyr/vignettes/introduction.html