Peter Svenning explains why paid ads don't work for cheap books: costs eat the profit. Instead, find someone who already reaches your customers and split the revenue from selling through their audience.
One of the coaches I'm currently working with asked me, should I run ads.
To sell out all these books because she's also an author. I was like, if you try to sell this book for about $10, you would lose money.
Here's something better. Go and find someone who has your dream client and then have them sell their book and you split the profits. No risk, no hassle. This is her book selling in Norwegian bookstores because the clients are already there and she just put herself in front of it. Isn't that a smarter way of doing it? So if you have someone seeing you and helping you make smart choices, you'll have a better life. So go ask someone instead of overthinking it. Go get great advice.