Reference

Here is a list of some sources to which I’m particularly indebted, those I’ve quoted in the epigraphs introducing the parts of the book, and those cited in the appendices. The entries often include some facts and thoughts I would like to share with you in the hope that they can help you find reliable and enjoyable literature—if a novel in the Covilhã’s Secret Journal has whetted your appetite for delving into one aspect or another in greater depth.