reference: link to clojure speaker slides and transcripts

Author: practicalli-johnny

docs/reference/index.md

@@ -1 +1,8 @@
 # Reference
+
+Useful information about Clojure presented as a reference, rather than guides as the rest of the book presents.
+
+
+## Talk Transcripts
+
+[:globe_with_meridians: Talk transcripts](https://github.com/matthiasn/talk-transcripts) repository contains slides and text from many different speakers and their presentations, including Rich Hickey, Stuart Halloway, David Nolen and Alex Miller.