For people looking at the file listing for the English list (#2689)

* For people looking at the file listing for the English list. (This redirect may eventually swap contents with the primary /free-programming-books.md to put English on an equal footing with the other languages.)

* Link fixed. Comment added.

free-programming-books-en.md

+### Index
+
+* [All](#all)
+
+
+### All
+
+* [English](/free-programming-books.md) (The list of books in English is here for historical reasons.)