There is a specific kind of panic that sets in when you hit "Publish" on Amazon, pop the champagne, and then... ding! You get an email from the KDP Setup Team.

Subject: "ATTENTION REQUIRED: Review your file."

Your heart sinks. Did you break the law? Is your book terrible? No! You just tripped over a robot. KDP's automated check system is extremely strict, but it's also very predictable. Let's fix the three most common errors so you can get that book live.

Error #1: "Insufficient Gutter" Explained

What it means in plain English: Your words are too close to the spine. If they printed it, readers would have to rip the book open to read the text.

The Fix: You need to increase your "Inside Margin."

Error #2: "Fonts Not Embedded" Error Fix

What it means: You used a cool font on your laptop. Amazon's printer computers don't have that font installed. So, they have no idea how to print it.

The Fix: You must "embed" the font information inside the PDF file itself. In Microsoft Word: Go to File > Options > Save. Look for a checkbox that says "Embed fonts in the file." Check it. Save as PDF.

Error #3: "Images are less than 300 DPI"

What it means: Your images look fine on a screen (which only needs 72 dots per inch), but they will look pixelated and fuzzy on paper (which needs 300 dots per inch).

The Fix: You usually need to find a higher-quality source image. Don't just drag-and-drop images from Google Images—they are almost always too small for print!