This introductory chapter situates the monograph’s aims and significance within global ecocritical and postcolonial scholarship on “unsettlement” and Indigenous and non-Indigenous belonging. I outline my argument that ecofiction novels authored by both Indigenous and non-Indigenous Australian writers interrogate Western-colonial preconceptions of nature and belonging through varied depictions of the nonhuman, emphasising the increasingly relevant notion of unsettlement in the context of climate crisis and the (post)colonial nation state. There is particular attention paid to addressing whether contemporary “postcolonial ecocriticism” adequately reflects all postcolonial literary traditions, such as that of the Australian postcolonial nation state. I also position myself as a non-Indigenous, Anglo-Celtic Australian scholar and define some key terms relevant to my argument, such as “ecofiction”, “nonhuman”, “nature”, “place”, “Indigenous”, “non-Indigenous”, “settler” and “unsettlement”.