Hell's Belles Book 4 - Any updates?

I devoured the {Hell's Belles by Sarah Maclean} and have been eagerly awaiting the 4th book. According to various websites and Goodreads, the 4th book is due to come out on Apr 22 of this year.

However, there's no cover and Sarah Maclean's website has the next upcoming book as July with no mention of Hell's Belles. Does anyone have any details of when we can expect this book?