diff --git a/content/notes/think-writing.md b/content/notes/think-writing.md
index dfe798686..e42cf85a8 100644
--- a/content/notes/think-writing.md
+++ b/content/notes/think-writing.md
@@ -52,4 +52,8 @@ yesterday
 	- one existing peer needs permission to add another peer
 
 what about removing a person from the chain?
-- within hyperledger. 
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+- within hyperledger. 
+
+should i be using iroha2 - much better docs, newer version.
+
+https://github.com/hyperledger/iroha/blob/iroha2-dev/docs/source/iroha_2_whitepaper.md
\ No newline at end of file