One of my biggest fears when writing my novel is that I'll spend months and months, possibly longer, writing what I believe to be an awesome book, but at the end of the day, it either won't be published, or if it is, it'll massively fail. Of course, I understand you can't exactly predict the future, is there any way of at least having a good idea as to whether or not your idea is even a decent one in the first place? I mean, I really like my Deadbeat's Guide stuff that I'm writing. I personally think it's funny and engaging, and occasionally, some say it's okay. But how can I be sure that agents and publishers will also like it? I've already put in so much time and effort into my story, and I can't imagine investing 50x more time and seeing absolutely zero results. I mean, sure, there are beta readers, but those come AFTER all the work. How do I know my idea/plot itself is even tenable?