The Song of the Winns (Gerander Trilogy #1)
Alex, Alice and Alistair think they are just three ordinary mice, until Alistair mysteriously vanishes. Then Alex and Alice learn a secret about their family - a secret which means Alistair's life is in danger, unless Alex and Alice can find him first. So begins a hair-raising journey as Alex and Alice try to outrun enemy agents in a desperate race against time. Meanwhile, Alistair is astonished to find himself in a far-off land where everyone except his new friend Tibby Rose is his enemy. But why? Pursued at every turn, the pair must try to unravel the mystery. And when they do, they discover that it is not only their own lives which are in peril; the future of an entire country is at stake.