What is the reading order for the Invincible comic series, including spin-offs?

The main Invincible series runs for 144 issues. After that, there are several spin-offs: 'Invincible Universe,' 'Invincible Presents: Atom Eve & Rex,' and 'Invincible: Requiem.' The recommended reading order is the main series first, followed by 'Requiem,' then 'Invincible Universe,' and finally 'Atom Eve & Rex.' This ensures you experience the story in its intended chronological order.