BiblioVault may have an electronic file which would meet your requirements for this title:
Four Last Songs: Aging and Creativity in Verdi, Strauss, Messiaen, and Britten
Linda Hutcheon and Michael Hutcheon
Paper: 978-0-226-42068-4
Cloth: 978-0-226-25559-0
Electronic: 978-0-226-25562-0