The Complete Verdi Libretti Volume 4 by Nico Castel includes:
Rigoletto
Simon Boccanegra
Stiffelio
La Traviata
Il Travatore
I Vespri Siciliani

With International Phonetic Alphabet transcriptions, word for word translations, a guide to the I.P.A., and notes on the Italian transcriptions.
EIllustrations by Eugene Green
Foreward by Sherrill Milnes
523 Pages Hard Cover