What is the reading order for the 'Invincible' full comic collection digitally?

For the 'Invincible' full comic collection, the primary reading order is chronological by issue number from #1 to #144. However, there are several tie-in issues and miniseries. While not strictly essential, reading related arcs like 'The Viltrumite War' at the point they were published or after the main 'Invincible' series concludes can enhance the experience. Many digital collections will provide suggested reading orders.