A DIRECTOR PREPARES by Anne Bogart (Pricey, but worth it)
"Impossible is just a big word thrown around by small men who find it easier to live in the world they've been given than to explore the power they have to change it. Impossible is not a fact. It's an opinion. Impossible is not a declaration. It's a dare. Impossible is potential. Impossible is temporary. Impossible is nothing.”
~ Muhammad Ali
Don't know if this is exactly what you're looking for, but a book that I really enjoyed was Unnaturally Green by Felicia Ricci (an Elphaba stand by for the San Francsico run of wicked in 2010. It's about her journey from auditions to SF's closing night. It's really a book about her, and what the experience was like, but at the same time, there's a lot of bts information on what the audition and rehearsal processes were like, how it all works trying to move across the country, what it's like back stage, all that kind of stuff, and I really loved it. (It's also really funny, because she has a wonderful kind of self deprecating, but very honest humor)
The Season by William Goldman Not Since Carrie by Ken Mandelbaum Nothing Like a Dame by Eddie Shapiro Hello Gorgeous by William J. Mann Look, I Made a Hat & Finishing the Hat by Stephen Sondheim Sondheim & Company by Craig Zadan Broadway Musicals: From the Pages of the New York Times
"Contentment, it seems, simply happens. It appears accompanied by no bravos and no tears."
I second Moss Hart's Act One, just finished it and absolutely loved it.
Also Jenn Tepper's Untold Stories of Broadway gives a lot of insight into the individual theaters through stories from the shows that have been in them.