The book systematically presents Derrida's views on hospitality, as reflected in his texts and lectures from 1995 until his death in October 2004. Derrida's engagement with hospitality is perhaps the most important and extensive philosophical attempt to respond critically to the growing hostility of many governments worldwide towards specific categories of foreigners, such as refugees and immigrants. Particular emphasis is placed on the 'aporetic' nature of hospitality that Derrida describes: namely, that, on the one hand, the provision of hospitality brings us face to face with the hyper-ethical 'law' of 'unconditional hospitality,' which requires the unconditional reception of the other, i.e. the provision of hospitality to the foreigner without conditions, restrictions or expecting anything in return. On the other hand, the provision of hospitality forces us to face the 'conditional' laws of hospitality, which, while establishing a right to and a duty of hospitality, simultaneously restrict hospitality by setting conditions for the arrival and stay of the foreigner. The book also analyses the 'decision' and the 'event' of hospitality, as well as the unresolved 'aporia' at the heart of the ethics of hospitality (or of ethics in general), an aporia or contradiction related to the fact that we cannot be hospitable towards a singularity without 'sacrificing' some other singularities. Attention is paid to Derrida's attempt to open the provision of hospitality beyond humans, that is, to other living beings. Derrida's views on hospitality are examined in the book in the light of the philosophical thought of Emmanuel Levinas, Immanuel Kant and René Schérer.