I have a deep affection for SF, and I also have a great liking for a significant portion of what is grouped under the rather stodgy title of 'classic literature'. It is evident that Dan Simmons shares this sentiment. Set in a far-distant future, long after the merger of both AI and posthumans, this novel presents three main storylines that ultimately intersect.
First, there is a group of indolent, pleasure-seeking old-style humans inhabiting the old earth. All their needs are attended to by mechanical servitors that were presumably left for them by the posthumans. Upon reaching the age of a century, they are expected to ascend to the orbital rings where the posthumans dwell and join them. A small group of these old-style humans decides to uncover the truth about what is truly happening in those orbital rings. As it transpires, this involves Prospero and Caliban from Shakespeare's 'Tempest'.
Simultaneously, a group of AI robots left to pursue their own objectives in the Jupiter moon system notice anomalous levels of quantum activity on Mars and launch a mission to determine what is occurring. Among them are Mahnmut, who is fixated on Shakespeare's sonnets, and his friend Orphu, who has a preference for Proust.
Oh, and there are also the Olympian gods, who possess all the powers attributed to them in Greek mythology. However, it appears that they cannot foresee the future, so they have brought back a group of scholars from the future to confirm if the events unfolding as they observe and intervene in the Trojan War align with Homer's account.
Simmons has achieved a remarkable feat here. His novel is teeming with the latest hard SF concerns regarding posthumanism, quantum science, AI, and so forth. At the same time, he has discovered a means to incorporate heroes from antiquity and great works of literature from our past and utilize them to shed light on what our future might resemble.
ILIUM is the first part of a duology. The second part is OLYMPOS, which I am currently reading. There is so much that remains unresolved in the first book that I believe the two would be best regarded as one long story divided into two books.