Opera's songbook (8)
I believe the answer is:
libretto
(Other definitions for libretto that I've seen before include "Text set to music in opera" , "Operatic text" , "Operatic book" , "component of opera" , "Book of words of an opera" .)
I believe the answer is:
libretto
(Other definitions for libretto that I've seen before include "Text set to music in opera" , "Operatic text" , "Operatic book" , "component of opera" , "Book of words of an opera" .)