The Tyranny of Opinion: Conformity and the Future of Liberalism. It's nice to reach this point, and I can report that it's a beautifully packaged book. It looks and feels lovely, and the format is very easy to read. Other people will, of course, have to make up their own minds about the quality of the arguments.
The official publication date of The Tyranny of Opinion is 18 October 2018. From that point, it should be shipping from suppliers such as Amazon (and the Kindle edition should be available for purchase). By then or shortly thereafter, it should also be in bookshops. To make sure it's ordered in by your local bookshop, you can always draw it to their attention.