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@@ -263,7 +263,7 @@ Get skill tree poster digital downloads on my [website for free](https://www.mak
 
 [Skill Trees Keynote Talk at Everything Open 2025](https://www.youtube.com/watch?v=9fPWhsIVjkU)
 
-[Using Skill Tree Templates to Gamify Learning](https://oercollective.caul.edu.au/openedaustralasia/chapter/using-skill-tree/) - Open Educational Resources Book Chapter, Published Oct 2025
+[Using Skill Tree Templates to Gamify Learning](https://adelaideuniversity.pressbooks.pub/openedaustralasia/chapter/using-skill-tree/) - Open Educational Resources Book Chapter, Published Oct 2025
 
 Skill Trees Asynchronous Presentation at the Open Hardware Summit 2024
 [![image](https://github.com/sjpiper145/MakerSkillTree/assets/7828884/ea416c43-2179-4919-9aeb-6e45cf4516cd)](https://www.youtube.com/watch?v=gB10vAvSiMU&ab_channel=TheOpenSourceHardwareAssociation)