Thalia Kalkipsakis 
Lifespan of Starlight #3 
Edge of Time

The thrilling conclusion to the Lifespan of Starlight trilogy On the run from the government Scout uses time-travel as a way to survive. But her decades-long disappearance is finally catching up with her… When Scout returns from her longest time-skip yet her world has been turned upside down. Her friends are now co-operating with the authoritarian regime that Scout worked so hard to escape from — and they’re prepared to hand her in. Her life depends on a virtual stranger and with surveillance tighter than ever evading capture will be next to impossible. Worst of all Mason is nowhere to be found. As Scout sets out on a desperate search for Mason she discovers something shocking: living somewhere in the heart of the city is a mysterious woman who holds the key to travelling backwards in time. But who is she and how did she learn to skip? Finding her could offer Scout a chance to shape a new future — if she can learn to let go of her past.