The Algebraist

As complex, turbulent and spectacular as the gas giant on which it is set, this novel from Iain M. Banks is space opera on a truly epic scale.
“An enormously enjoyable book, full of wonderful aliens, a sense of wonder and subtle political commentary on current events.” –Publishers Weekly (Starred Review) 
It is 4034 AD. Humanity has made it to the stars. Fassin Taak, a Slow Seer at the Court of the Nasqueron Dwellers, will be fortunate if he makes it to the end of the year.
The Nasqueron Dwellers inhabit a gas giant on the outskirts of the galaxy, in a system awaiting its wormhole connection to the rest of civilization. In the meantime, they are dismissed as decadents living in a state of highly developed barbarism, hoarding data without order, hunting their own young and fighting pointless formal wars.
Seconded to a military-religious order he's barely heard of - part of the baroque hierarchy of the Mercatoria,...