Books 1-5
 
The Blade of Shadows series, by Sara Samuels, is a time-travel romance fantasy series following Olivia, a Timeborne with the ability to travel through time, and Roman, a former Roman gladiator.
The series is known for its twists, turns, and complex plotlines, with each book bringing readers closer to a shocking conclusion!
 
Tropes across the series include:
Enemies to lovers
Forced proximity 
Found family 
Unhinged villains 
Secret Society
Betrayal 
Dark secrets 
Villain POV 
No redemption