I can’t buy books from the Audible app itself?

Nope. You can’t. Similar to how you can’t buy Kindle books from an app on your iPhone 😊 - this is so that Amazon does not have to pay the 30% tax to Apple / Google.

Not from Apple devices

And I have been pulling my hair thinking why I am submitting myself to this shitty experience. Anyhoo - Recommendations for a good book to be heard on Audible?

Anything by Stephen Fry. Would recommend Harry Potter even if you have read the books before!

Here you go: https://twitter.com/_swanand/status/1333455353934037004