Larklight by Philip Reeve

A Rousing Tale of Dauntless Pluck in the Farthest Reaches of Space

A pair of Victorian siblings living in a rambling house orbiting the Moon are propelled into an adventure across the solar system when their home is attacked by strange, spider-like beings; rescued by a dashing young space pirate and his eccentric crew, they navigate floating cities and alien empires, uncover long-buried secrets about their family, and race to thwart an ancient plot that threatens the very future of the British Empire among the stars.