Here's a possible breakdown of the thinking behind the decision:
* Genre: It is true that *The Aeneid* is classified as an epic poem, while *Metamorphoses* is often labelled as a narrative poem. This might lead some list compilers to categorize *Metamorphoses* as more closely aligned with "novels" due to its extensive narrative structure, even if it lacks prose. However, this distinction can be quite blurry.
* Influence: *Metamorphoses* is arguably more influential in Western literature than *The Aeneid*, at least in terms of its sheer impact on themes and motifs. Countless works have drawn inspiration from Ovid's tales, shaping everything from Renaissance art to Shakespearean plays.
* Readability: While both are considered masterpieces, *Metamorphoses* might be considered more accessible to a modern reader. The fragmented nature of its stories allows for easier entry points, while *The Aeneid's* more epic scope might seem daunting to some.
* Subjectivity: Ultimately, "must-read" lists are inherently subjective. The compilers may have their own personal biases, favoring works that resonate with them or that they believe are essential to understanding literature as a whole.
Ultimately, the exclusion of *The Aeneid* is a matter of opinion, and you are perfectly justified in finding it confusing. It's a reminder that such lists are not definitive guides, but rather invitations to explore a vast and fascinating literary landscape.
If you are genuinely interested in *The Aeneid*, I highly recommend giving it a try! It is a powerful and moving work that offers a unique perspective on the founding of Rome, and it still resonates with readers today.