diff --git a/books/free-programming-books-langs.md b/books/free-programming-books-langs.md
index 827d342d6..ab0344903 100644
--- a/books/free-programming-books-langs.md
+++ b/books/free-programming-books-langs.md
@@ -1540,7 +1540,7 @@ Books on general-purpose programming that don't focus on a specific language are
 * [Interpreting LISP](http://www.civilized.com/files/lispbook.pdf) - Gary D. Knott (PDF)
 * [Learn Lisp The Hard Way](https://github.com/LispTO/llthw) - Colin J.E. Lupton
 * [Let Over Lambda - 50 Years of Lisp](http://letoverlambda.com/index.cl/) - D. Hoyte
-* [Lisp Hackers: Interviews with 100x More Productive Programmers](https://leanpub.com/lisphackers/read) - Vsevolod Dyomkin
+* [Lisp Hackers: Interviews with 100x More Productive Programmers](https://leanpub.com/lisphackers/read) - Vsevolod Dyomkin (HTML)
 * [Lisp Koans](https://github.com/google/lisp-koans)
 * [Lisp Web Tales](https://leanpub.com/lispwebtales) - Pavel Penev
 * [Loving Common Lisp, or the Savvy Programmer's Secret Weapon](https://leanpub.com/lovinglisp/read) - Mark Watson (HTML)