Blue remembered Earth

Blue Remembered Earth is a science fiction novel by Welsh author Alastair Reynolds, first published by Gollancz on 19 January 2012. It describes the efforts of two adult siblings to solve a mystery in the pseudo-utopian 2160s. The novel is the first of the Poseidon's Children trilogy, which follows humanity's development over many centuries, with the intention of portraying a more optimistic future than anything Reynolds had previously written. The second book in the trilogy, On the Steel Breeze, was released on 26 September 2013, and the trilogy's finale, Poseidon's Wake, was released on 30 April 2015.