It should be released in Great Britain, where Michelle lives, in less than two weeks, with hopes an American printing soon will follow. Fortunately, you can order it regardless of where you live -- simply go to the UK publisher's website and order, http://www.thehistorypress.co.uk/publication/carole-lombard-twentieth-century-star/9780750966054/ or https://www.amazon.co.uk/Carole-Lombard-Twentieth-Century-Michelle-Morgan/dp/075096605X. I would not be surprised if the Larry Edmunds Bookshop on Hollywood Boulevard will get copies in the near future, as it has promoted Morgan's recent (and well-received) Thelma Todd biography.
I haven't read "Twentieth-Century Star" yet, although I'm certainly eager to (as many of you are aware, Michelle has dedicated the book to both myself and Lombard authority Carole Sampeck), but Morgan's track record on Hollywood bios -- her several books on Marilyn Monroe focus on her as a person, unlike so many Monroe biographers who are too blinded by her sex-symbol persona -- and her talent at research promise to make this volume the definitive Lombard bio. (Disclosure: I assisted her with research.)
A week ago Monday, the London daily the Express ran an interview with Morgan about Carole (http://www.express.co.uk/news/uk/702434/carole-lombard-life-new-book-twentieth-century-star-michelle-morgan), and it's fascinating.
As Morgan wrote promoting the book at her site, http://michellemorgan.co.uk, "Carole was a woman well ahead of her time, and her experiences have taught me a lot about how I want to conduct my own career. ... She was definitely a woman to be admired, and I hope this comes across in the book." (Morgan's offical Facebook author page, https://www.facebook.com/groups/124973377514850/, also is worth checking out.)