Sentience features the mix of hard sci-fi, philosophical exploration, human (cyborg) drama, and humorous narration that are common to all of Moore's works. (I've read 4 or 5 of his books.)
While the narration is about robot-on-alien battles and neural implant upgrades, there is a well-developed subtext that treats a wide range of more serious topics with varying levels of directness. The most developed of these topics include a discussion of faction-building, by which I mean how can a leader motivate actors with disparate and competing interests into allying with each other towards a larger cause. There is also a deep treatment of the importance of self-awareness in learning and growth (conquering the universe requires a suite of skills that most previous jobs won't have prepared you for). And there are numerous other threads to this densely woven story.
This is the kind of sci-fi I like -- it uses fictional (albeit perhaps possible) technologies to create situations in which human and social questions can be examined, all the while wrapping everything up in a fast-paced plot with action, drama, and humor.
Synopsis:
This book pits the nefarious, super-intelligent Morbius and the team of intelligent, self-aware programs he has liberated from a powerful research computer against the human race. Morbius, able to harness the power of zero point energy at will, quickly establishes dominance over the planet and turns humanity's energies towards building a galactic empire. This attracts hostile attention from alien civilizations, who launch a series of attacks against Earth.
Facing constant attacks from the stars, Morbius finds himself defending the planet he conquered. His powers are stretched to the limit and Earth's continued existence begins to look unlikely. Perhaps there is a way he can turn the alien attackers into his allies...
Even as Morbius struggles to simultaneously enslave and defend Earth, an older generation of military cyborgs abandoned when upgraded technologies became available, decide to come to the rescue of their erstwhile human masters. They quickly determine that a frontal assault on Morbius can never work, but perhaps there are other ways to protect the planet...