Shadow Walkers: Book 1 of The Books of Arona. The Books of Arona, #1

She has no memory of a secret war, but finds herself hunted for the part she played. A war hero who doesn't remember saving the world. or that mythical monsters walk among us. A secret agency determined to keep that truth hidden. A superhuman terrorist hellbent on hunting her down. and a bond that could change everything they thought they knew. Packed with adventure and simmering with slow-burn romance, Shadow Walkers plunges readers into a modern world of reimagined myths, where shadowy giants of ancient folklore wage a secret war against humanity.
As Melanie navigates a hidden underworld of superhumans, traitors, and family she's not sure she can trust, she fights to confront her stolen past. Careening toward a final showdown, she must wrestle with her own heart to decide where she truly belongs.