Hi sujohu,
Welcome to Affinity Forums
To get the link, go to page 69 (it's the one with a green background) and in the middle there's a sentence that starts with "You can get all resources you need...". Copy the link in bold to the URL field on your browser and press Enter to download all the files for that chapter. The files referenced in the Resource boxes on the pages of that chapter refer to the files contained in that download. Same for all the other chapters (each one has a link in the introductory page to download the resources for that chapter).
