diff --git a/.gitignore b/.gitignore
index 4ee62dd9..0b351762 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,7 @@ notes/
 *_env*/
 
 *.DS_Store
+
+.jekyll-metadata
+.ruby-version
+_site/
diff --git a/README.md b/README.md
index 64705bbd..6dc8fcd0 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,8 @@
+> [!WARNING]
+> The second edition of Python Crash Course has been out of print since 2023, and is significantly out of date at this point. The third edition is fully up to date.
+> 
+> All resources for the third edition can be found [here](https://ehmatthes.github.io/pcc_3e/).
+
 Python Crash Course - Second Edition
 ===
 
@@ -8,6 +13,10 @@ This is a collection of resources for [Python Crash Course, Second Edition](http
 
 If you have any questions about Python Crash Course, feel free to get in touch:
 
-Email: ehmatthes@gmail.com
+Email: [ehmatthes@gmail.com](mailto:ehmatthes@gmail.com)
+
+Mastodon: [@ehmatthes@fosstodon.org](https://fosstodon.org/@ehmatthes)
+
+Bluesky: [@ehmatthes.bsky.social](https://bsky.app/profile/ehmatthes.bsky.social)
 
-Twitter: [@ehmatthes](http://twitter.com/ehmatthes/)
+Biweekly newsletter: [Mostly Python](https://www.mostlypython.com)