The Principle of Moments by Esmie Jikiemi-Pearson

The Principle of Moments by Esmie Jikiemi-PearsonA century spanning space fantasy novel that will take you on a whirlwind adventure, from a Regency Era love affair between a time traveller and the prince waiting for him in the past, to a rescue mission in the 60th century, where a girl desperately races against time as she searches for the sister the emperor stole. 6066: In Emperor Thracins brave new galaxy, humans are not citizens. Instead, they are indentured labourers, working to repay the debt

When an ancient prophecy of destruction threatens to come true

it's to assassinate the ace male pilot responsible for her sister's death

and blamed for the plague of monsters that razed the land twenty years before

Elisabeth has known that as long as she has known anything

summoning angels and forcing them to do her bidding

she is utterly repelled by the rest of her fiction writing cohort--a clique of unbearably twee rich girls who call each other Bunny

Two childhood friends

he is not what he seems

He's determined to do his late best friend proud

With little hope for rescue and only each other as their final tether to humanity

When she meets her intended

she no longer even knows the truth of her own blood