If you're a member of the CII all of the study texts for every exam are here to view before purchasing enrolment. Format isn't ideal and can't download as PDF etc, but might help in the meantime before you can enrol.
I can email you my AF8 PDF no dramas - it's crap though won't really help you - I don't think I looked at it and passed the essays (scraped!) within 4 months.
Now seems like a good time to remind users of the forum of this post about sharing paid for learning materials - https://thebigtent.paraplannersassembly.co.uk/discussion/822/updated-paid-for-and-licensed-material#latest
We're not sure if texts above are paid for but if they are, it may be worth checking the terms.
The AF8 book is pretty useless. It's more about doing your own research and a cash flow program etc.