Ivy Trent has worked with antiquarian books for over thirty years, first as a cataloger of history of science and medicine at Zeitlin and Ver Brugge.  She compiled  Bibliotheca Mechanica (1991) the catalogue of the Verne L. Roberts collection in theory of elasticity and strength of materials.  For the last twenty years she has worked with historical children’s books at the Cotsen Children’s Library, Los Angeles  and then as editor of the Cotsen Occasional Press which publishes works of scholarship relating to the Cotsen collections.  She has written introductions and provided critical apparatus to the facsimiles:  Marseilles, Genoa and Pisa  A Beatrix Potter Photograph Album (1998),  Das Wunderknaul  The Wondrous Ball of Yarn (2008) and Little Book of Animals By Soloman James (2010).