kindle-previewer

Install command: 
brew install --cask kindle-previewer

Name: Kindle Previewer

Preview and audit Kindle eBooks

https://kdp.amazon.com/en_US/help/topic/G202131170

Cask JSON API: /api/cask/kindle-previewer.json

Cask code: kindle-previewer.rb on GitHub

Current version: 3.99.0

Requirements: macOS >= 10.15

Analytics:

Installs (30 days)
kindle-previewer 32
Installs (90 days)
kindle-previewer 110
Installs (365 days)
kindle-previewer 416