The "next" D-Day campaign book is listed for pre-order on at least one online book store, release date 23 Jun 2020.
Its apparently titled as "Campaign: D-Day: US Sector". With the first book already out and covering the first 24 hours only, we knew that there would be *an* additional book coming. However based on the title it looks like there will be multiple campaign books coming breaking things down it to LOT'S of detail and hopefully meaning that you wont miss out on the history of your favorite nation. That's my guess based on an early pre-release listing which can be notoriously unreliable. Adding to a huge list of supplements already available, I will have enough gaming for a lifetime of WWII and I'm loving it.