Motown Treasures

I recently read about an upcoming book on Motown's Rise in Britain:

Also delving into Motown’s rise in Britain is a new book by Sharon Davis and Duncan Sibbald, due in the spring. This detailed history, two years in the works, traces a timeline which began in Detroit and ended in London, thanks to a helping hand “from a passionate, blonde, panda-eyed fan,” as co-author Davis puts it. She’s well-known to Hitsville pilgrims, of course, by way of such previous titles as Motown: The History and Rhythms of Wonder.

Does anyone know a projected release date for this book?  It will be a perfect supplement to Keith Rylatt's excellent book.