I have been reading them on my lunch break. They give some interesting background on Declan’s early years and flesh out his relationship with Levi. As far as the price for the tokens, you get your first 200 free. And here is a chart I found for the pricing:
Kindle Vella token prices and value Number of tokens Price Price of each token Rough word count
200 $1.99 $0.01 20,000
525 $4.99 $0.0095 52,500
1100 $9.99 $0.009 110,000
1700 $14.99 $0.0088 170,000
Would certainly recommend them for the Demon Accords. But beyond that it might be a good way to get a quick sample of some of the other authors work without having to buy a full book.