The King Will Kill You by Sarah Henning

Princess Amarande is finally on the verge of having everything she wants. To be with her true love Luca, no one nor law standing in the way. To rule Ardenia as queen outright, no marriage necessary, as Luca does the same with the reformed Torrence. To rebuild the continent of The Sand and Sky into a place not defined by archaic, patriarchal laws, but by the will of its people.
However, threats await in the shadows of Amarande’s hoped-for happily ever after. One expected and deadly to both her love and every one of her objectives. The other, unexpected, and arising with a vicious aim: revenge at any cost. Against the princess who killed him, the boy whose love made her do it, and the continent cruel enough to deserve his rage.

The King Will Kill You is the epic, pulse-pounding conclusion to Sarah Henning’s Kingdoms of Sand and Sky trilogy.