adds urls

Author: Nowosad

index.qmd

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 This is the online home of *Geocomputation with Python*, a book on reproducible geographic data analysis with open source software.
 
+**Note**: The book has been published in the [Chapman & Hall/CRC The Python Series](https://www.routledge.com/Chapman--HallCRC-The-Python-Series/book-series/PYTH).
+You can buy the book from [publisher](https://www.routledge.com/Geocomputation-with-Python/Dorman-Graser-Nowosad-Lovelace/p/book/9781032460659), or [Amazon](https://www.amazon.com/Geocomputation-Python-Chapman-Hall-CRC/dp/1032460652/).
+
 Inspired by the Free and Open Source Software for Geospatial ([FOSS4G](https://foss4g.org/)) movement this is an *open source book*.
 Find the code underlying the *geocompy* project on [GitHub](https://github.com/geocompx/geocompy), ensuring that the content is reproducible, transparent, and accessible.
 Making the book open source allows you or anyone else, to interact with the project by opening [issues](https://github.com/geocompx/geocompy/issues), making typo fixes and more, for the benefit of everyone.