A few months ago, Gollancz confirmed that Scott Lynch's The Thorn of Emberlain - the fourth book in his excellent Gentleman Bastard series - was a lock for release on 22 September this year. However, it is now looking less likely that the book will hit that date.
The book was recently pulled from Amazon UK and replaced by a 2018 placeholder, whilst the American edition of the novel has never been listed at all.
It might be that there has been some mix-up with the schedules, or that Bantam was unable to go to print that quickly and has now convinced Gollancz to delay until they are also ready. But so far no official explanation has been given for the book being pulled. If it has been delayed, it certainly won't be until 2018. Based on Scott's comments about how the book was coming together, I suspect (and hope) it will be more moderate delay until early 2017 at worst.
More news as soon as we get it.
UPDATE: Scott Lynch has confirmed that the book will not hit its release date, citing delays stemming from a move of house and writing space. He confirms that the current placeholder dates are not accurate and a more realistic date will be announced soon.