Running ads and watching numbers go up and down without knowing what any of them are actually telling you is one of the fastest ways to burn through a budget and walk away convinced that ads just don't work.

They do work. The issue is almost never the ads themselves.

Rebecca Hamilton has been running and analyzing book ads for fiction authors for over a decade, and the metrics conversation comes up constantly, because most authors are measuring the wrong things, drawing conclusions too early, and making changes based on data they don't fully understand yet. This post breaks down what each metric is actually telling you and how to use them together to make decisions that improve your bottom line.

Why Book Ad Metrics for Fiction Authors Work Differently in 2026

Book advertising is not the same as advertising a physical product. The average minimum order value Facebook recommends for products being advertised through their platform is $50 to $75. The average book price is nowhere near...