I'm about halfway finished writing a book titled, "Parallel Computation for Data Science: with Examples in R and Beyond," to be published later this year by Chapman and Hall. I'm making a rough draft of the first half of the book available on the Web: http://heather.cs.ucdavis.edu/paralleldatasci.pdf Your comments and suggestions are welcome, in fact very much hoped-for. I took this approach when I wrote my R programming book, and found it very helpful to me, and of much value to people who downloaded it. Hopefully the same will be true here. Norm Matloff