Singing Lessons - Books for Vocals

The vocal coach gave my daughter some great tips. He said that when you audition for musical theater (which he has performed in on Broadway and off), you will have to sing your audition piece in the key that the musical is in and that plain old piano music isn't always in the key that you need it to be in. He recommended the series of books The Singer's Musical Theatre Anthology which comes in different singing styles such as Tenor, soprano, etc. We haven't purchased the specific book yet, but when we do, I'll write about it.