diff --git a/books/free-programming-books.md b/books/free-programming-books.md
index 2ca29dd2d..25d75e709 100644
--- a/books/free-programming-books.md
+++ b/books/free-programming-books.md
@@ -2601,6 +2601,7 @@ Kerridge (PDF) (email address *requested*, not required)
 * [Data Analysis for the Life Sciences](https://leanpub.com/dataanalysisforthelifesciences) - Rafael A Irizarry, Michael I Love *(Leanpub account or valid email requested)*
 * [Efficient R programming](https://csgillespie.github.io/efficientR/) - Colin Gillespie, Robin Lovelace
 * [Exploratory Data Analysis with R](https://leanpub.com/exdata) - Roger D. Peng *(Leanpub account or valid email requested)*
+* [Functional Programming](https://dcl-prog.stanford.edu) - Sara Altman, Bill Behrman and Hadley Wickham
 * [Introduction to Probability and Statistics Using R](https://github.com/gjkerns/IPSUR) - G. Jay Kerns (PDF)
 * [Learning Statistics with R](https://learningstatisticswithr.com/book/) - Danielle Navarro
 * [ModernDive](https://ismayc.github.io/moderndiver-book/) - Chester Ismay and Albert Y. Kim