diff --git a/books/free-programming-books.md b/books/free-programming-books.md
index 38b064c2d7548bdf33f2a52fe3b4f2b730c4e3c7..833844084da5b4fbed8ff3fd15107f9e50e09e5f 100644
--- a/books/free-programming-books.md
+++ b/books/free-programming-books.md
@@ -1253,7 +1253,7 @@ Kerridge (PDF) (email address *requested*, not required)
 * [Clojure Cookbook](https://github.com/clojure-cookbook/clojure-cookbook)
 * [Clojure Distilled Beginner Guide](http://yogthos.github.io/ClojureDistilled.html)
 * [Clojure for the Brave and True](http://www.braveclojure.com)
-* [Clojure in Small Pieces](http://daly.axiom-developer.org/clojure.pdf) - Rich Hickey (PDF)
+* [Clojure in Small Pieces](https://web.archive.org/web/20201013022918/http://daly.axiom-developer.org/clojure.pdf) - Rich Hickey, Timothy Daly (PDF) [(:card_file_box: *unglued*)](https://unglue.it/work/489419/)
 * [Clojure Koans](http://clojurekoans.com)
 * [Clojure Programming](https://en.wikibooks.org/wiki/Clojure_Programming) - Wikibooks
 * [ClojureScript Koans](http://clojurescriptkoans.com)