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.
Surface Detail 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:
http://www.amazon.co.uk/Surface-Deta...rds=iain+banks
and Amazon.com
http://www.amazon.com/s/ref=nb_sb_no...e+Detail+Banks
An Epub version is available from the itunes Store and I imagine it would also be obtainable from Kobo or Feedbooks.