STEADFAST STAR Book by J. Green

Three ships
One fleet
Many destinies
As Carys Ellis travels to Polaris she isn’t too concerned about what might happen. Whatever the future holds it can’t be worse than her past.And if it weren’t for her birds she wouldn’t even be aboard the Bres, flagship of the Interstellar Fleet.

But there’s more to the Steadfast Star than expected. The true nature of the beings inhabiting the strange system is revealed, and the lives of all her shipmates come under threat.

Carys goes from lowly aviary keeper to the most important person on the ship. She must figure out an answer or it’s the end of the voyage for everyone.