Other critical editions of Donizetti's operas on which Parker has worked include "Linda di Chamounix" in 2007 as well as those titles which appear on the Donizetti Society's list of works completed by Parker alone, such as "Lucrezia Borgia" (1998) and "Adelia". Additionally, along with Dotto, he has co-authored the critical edition of "Lucia di Lammermoor" which was presented at the Royal Opera House, London in 2003. Roger Parker is also credited as editor of the critical edition of Puccini's opera, "Manon Lescaut" published by Ricordi in 2013.