Books for writing musical theater?

[Semiazas]

Wondering if anyone had suggestions for books to get on the subject of writing book/music/lyrics for musical theater.
I'm planning on getting Finishing The Hat by Sondheim, but I'm looking for more books on the subject of musical writing.

Thanks a lot (:

 

[directorik]

I look forward to the replies.

I have written the book/lyrics for five musicals and the book for three.

 

[Semiazas]

As the voice of experience, are there any books you can recommend?

 

[directorik]

Never read one.

So in the last month did you find any books you like?