The best introductory book on Maurice Blanchot is Ullrich Haase and William Large's Maurice Blanchot (in the very fine Routledge Critical Thinkers series). Large's latest book, just out from Clinamen, is Emmanuel Levinas and Maurice Blanchot: Ethics and the Ambiguity of Writing. This has just arrived along with Alain Badiou's On Beckett.
About the Beckett title, Clinamen say:
... the first collection together of all of Badiou's work on Beckett, and the first translation of this important material. Badiou presents a Beckett whose work is the work of philosophy itself - a philosophy in the full sense of the word, which works to reduce experience to its essential determinations. Rejecting the stereotype view of Beckett as the dark existentialist of abandoned existence, Badiou rather focuseson what he calls the 'hidden poem' in the prosody and themes of Beckett's work. For Badiou, philosophy expresss itself immanently in culture through the 'procedures of truth' manifested in science, art, politics and love. These essays together furnish a meditation on the developments of Beckett's ideas, always philosophically allusive, from first works through The Unnameable (a solipsist impasse, claims Badiou, from which it would take Beckett ten years to escape), to a final engagement with questions of the Other and Love.
Also worth looking out for from Clinamen is Walter Benjamin's Philosophy: Destruction and Experience edited by Peter Osborne and Andrew Benjamin. I'll be reviewing the latter's Disclosing Spaces: On Painting in the next couple of weeks.