Wikipedia
Under Heaven is the eleventh novel by Canadian fantasy author Guy Gavriel Kay. It was published in April 2010 by Viking Canada. Set in a fantasied Tang China, it is Kay's first work set outside of a fantasied European or Mediterranean setting. The novel is based on a fictionalized version of the An Shi Rebellion. Under Heaven takes place in a completely new world, as seen by it having only one moon as opposed to the two moon normally present in Guy Gavriel Kay's works. In 2013 he published a second novel, River of Stars, set approximately 400 years later in the same world.
Usage examples of "under heaven".
If there is one thing under heaven at which our masters are experts, it is for arranging for such to have their wish, and die.
Or what creature is so beloved under heaven as the devout soul to which God entereth in, that he may feed it with His glorious flesh?
O Lord, what is my trust which I have in this life, or what is my greatest comfort of all the things which are seen under Heaven?