Why Is the Niche Finder “Find Books” Button Greyed Out?

The “Find Books” button is grayed out if you have not placed a value on a required field. The only required field is best sellers rank (or sales units). Please add a value on both the min and max input fields.

Alternatively, to get started faster and/or to learn how to use the Niche Finder faster, you can use a preset:

Niche Finder Presets