For The First Time Again by Sylvain Neuvel

Discover history's biggest secret . . .

For millennia an unbroken line of alien mothers and daughters have secretly been shepherding human technology towards the stars. Twelve-year-old Aster is the last of this line. But the loss of her mother in early life means she knows nothing of her alien heritage - believing she is just an ordinary young girl.

Not only is she about to discover how wrong she is - but she'll also learn she's not the only alien on Earth: others are here to stop her. Yet with revelation comes recovery. Now Aster has a purpose.

Her life, the future of her speciesand that of all life on Earth is at stake. She's history's biggest secret. But can she save the future?'Alt-history with a difference' GUARDIAN'There's real cleverness at work here' THE TIMES