The Lieutenant by Kate Grenville

Kate Grenville has returned to familiar territory that will delight lovers of The Secret River. Daniel Rooke, soldier and astronomer, was always an outsider. Sailing with the First Fleet in 1788 he witnesses first-hand what happens to men who push the boundaries and draw attention to themselves, so he is determined to fit in. But when an extraordinary friendship develops with the local aboriginal tribe, the lieutenant faces a decision that will define not only who he is but the course of his entire life.

Based closely on the notebooks of William Dawes, The Lieutenant is a compelling story about friendship and self-discovery.