Add more links to buy

index.qmd

@@ -10,7 +10,7 @@ This is the online version of the book. It is, and always will be,
 freely available here at [$\text{do4ds.com}$](https://do4ds.com). 
 
 Should you want
-a print copy of the book, it is available and shipping now from the [Routledge website](https://www.routledge.com/DevOps-for-Data-Science/Gold/p/book/9781032100340). 
+a print copy of the book, it is available and shipping now from the [Routledge website](https://www.routledge.com/DevOps-for-Data-Science/Gold/p/book/9781032100340), [Amazon](https://www.amazon.com/DevOps-Data-Science-Chapman-Hall/dp/1032100346), and several independent [online](https://edmondsbookshop.com/book/9781032100340) [bookstores](https://joyridebookshop.com/book/9781032100340). 
 
 ## About the author