A Bond so Fierce and Fragile by Sophia St. Germain — book slip

Elessia faces the Fae king's relentless attempts to break her through torture, darkness, and loss. Determined to fight back, she strives to escape his grasp, protect Havlands from rebels and Fae, and reunite with her beloved mate.

However, the ultimate battle may be for her own life, as even her mate's willingness to tear the world apart for her safety cannot shield her from the gods themselves.

For fans of Gild and The Cruel Prince.