Stuid Brits, Europeans, and Canucks get everything first. Seriously. Byatt's Children's Book came out in Canada months before it came out in the US. Part of the reason why I scheduled my trip to Toronoto at the time I did.
Sometimes you just have to go where the books are! In the good ol' days before the internet, I remember returning from trips to English speaking countries literally with a whole suitcase full of books and videos that I couldn't get in the OV in Germany ...
ETA: Cambridge University Press says "May 2018" for the UK edition. Yey!
http://www.cambridge.org/de/academic/subjects/literature/renaissance-and-early-modern-literature/imagining-shakespeares-wife-afterlife-anne-hathaway?format=PB#yyBOLmOrJHS2sDOm.97