I'm sure I'm not the only one who noticed. Many recent novels have the same title formula, which is, "X of Y and Z." Some particular publisher's fancy? Maybe I'm just imagining it, but here are some examples:
Children of Blood and Bone
Daughter of Smoke and Bone
Court of Frost and Starlight
Gods of Jade and Shadow
Song of Wraiths and Ruin
Children of Blood and Bone
Daughter of Smoke and Bone
Court of Frost and Starlight
Gods of Jade and Shadow
Song of Wraiths and Ruin