The Dark Earth Below — Martha Wells

In "The Dark Earth Below," Moon and Jade face their biggest adventure yet; their first clutch. But even as Moon tries to prepare for impending fatherhood, members of the Kek village in the colony tree's roots go missing, and searching for them only leads to more mysteries as the court is stalked by an unknown enemy. Stories of Moon and the shape changers of Raksura have delighted readers for years. This world is a dangerous place full of strange mysteries, where the future can never be taken for granted and must always be fought for with wits and ingenuity, and often tooth and claw.