The Dark Mirror by Samantha Shannon — book slip

Paige Mahoney finds herself outside the Republic of Scion for the first time in over a decade, with half a year missing from her memory.

As she navigates her way back to the revolution, her journey leads her to Venice, where she uncovers a dangerous secret that could alter the war between humans and immortals.

Before returning to London, Paige must assist the Domino Programme in unraveling the sinister Operation Ventriloquist. The key to recovering her memories and saving Italy might lie with Arcturus Mesarthim.

For fans of intricate worldbuilding and slow-burn romance.