Hi, Ayampixel.
We use Notion to distribute the book's content. This means it is an HTML page hosted on Notion servers using our custom domain.
You can always access the page here on itch.io again, after purchasing you get an unique download page bond to your itch.io user, from which you can access the content again.
I recommend you to either duplicate it to your own Notion account, this will make it so it is always available for you and you will be able to edit it however you like (highlighting, adding comments, and even uploading your project files).
An alternative is to simply bookmark the page to your browser so you can access it later.
