Which related texts are you referring to? There are some text notes that are related to the old AOS 'Belonging' (although these are specified in the list').
Related texts that are specific to 'discovery' are:
- The Eagleman Stag' (short film, visual)
- The Tell-Tale Heart (short story by...
I find the Cohen Curricula to be quite overwhelming and not particularly user-friendly. There are also no quotes etc.
Penfox has a great one which also comes with notes for a related text