Cassandra Clare (2010). “Cassandra Clare: The Mortal Instrument Series (3 books): City of Bones; City of Ashes; City of Glass”, p.388, Simon and Schuster
C.S. Lewis (2014). “A Grief Observed Readers' Edition: With contributions from Hilary Mantel, Jessica Martin, Jenna Bailey, Rowan Williams, Kate Saunders, Francis Spufford and Maureen Freely”, p.21, Faber & Faber