diff --git a/README.md b/README.md
index 23a5828..9a17fcf 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,3 @@
 # Immuno Workflow Course
 
-This course is an introduction to the [immuno workflow](https://github.com/wustl-oncology/analysis-wdls).  Automation from an [OTTR](https://www.ottrproject.org/) template generates [these github pages](https://griffithlab.github.io/Immuno_Workflow_Course) based on the documentation.
+This course is an introduction to the [immuno workflow](https://github.com/wustl-oncology/analysis-wdls).  Automation from an [OTTR](https://www.ottrproject.org/) template generates [these github pages](https://griffithlab.github.io/Immuno_Workflow_Course) based on the documentation. A leanpub version is also published [here](https://leanpub.com/c/immunoworkflowterra).