I nominate Surface Detail
by the late Iain M. Banks.
This is the penultimate Culture
novel by Banks--written in 2010. In fact, it is our final visit to the Universe of The Culture as it is set later than The Hydrogen Sonata
which was his final science-fiction novel.
is regarded as one of the finest books set in that Universe.
It has an epic sweep spanning Real and Virtual worlds. We meet the fascinating Ship minds, a memorable villain, and are submerged in a murder story, Machiavellian politics, a revenge quest and fascinating minor characters all set within four inter-related and integrated plots. The blurb from Amazon reads:
"It begins in the realm of the Real, where matter still matters.
It begins with a murder.
And it will not end until the Culture has gone to war with death itself."
While the culture novels share a common setting, they can be read as stand-alone books.
This wonderful book is available at a modest price from Amazon UK:
An Epub version is available from the itunes Store and I imagine it would also be obtainable from Kobo or Feedbooks.