The currently last of my recent partial re-reading of Iain M. Banks’ novels (also Iain without the M.’s novels). No one imagined this would be his last Culture novel. As far as Culture novels to go out on, it’s the right one. I imagine if Banks had known his impending demise was a year or more away, he might have written a banging Culture space opera monster of the Excession kind, which may or may not have been as satisfying or poignant as The Hydrogen Sonata, my Book of the Year in 2013. Indeed it might be exactly that bonkers space opera, having all the requisite elements of ship Minds, interstellar intrigue spanning 10 000 years, improbable bits of planets (both Ablate and the Gzilt homeworld, Zyse), and that great Banksian thing, Subliming. Plus four-armed musician, Vyr Cossont. (Four arms in order to play the work of the title on the Undecagonstring or elevenstring.) Proper sci-fi space opera this, and absolutely one of Banks’ best.