How does someone with no experience test a book idea?
Here’s a cheap and easy way to test a book idea without drawing a biased response.
Write your story in the same format as a film blurb. You can see examples online in any film download site. Next time you’re choosing a film to watch with your friend or your spouse, pretend you’re on Netflix (or whatever) and say “how about this one…”, but read out your story blurb.
If you get some interest, your book idea may be interesting too.