That is interesting. There is this book that I found which apparently is very neglectful of the German POV.
So perhaps if coupled with Tug Of War one can get a comprehensive history....
It's been a while since I've read it, but Whitaker (and his wife, who assisted him) was usually pretty good about writing from the other side of things. Mark Zuehlke has a "pop history" title on this period, and he's getting better at examining German records, though I think he still focuses more on experiences than deep analysis of operations.
Terry Copp is the go-to for analysis - I don't recall offhand if he's written specifically about the Scheldt. He did publish a history of the 5th Brigade which was the formation tasked to capturing the east end of Walcheren Island (called "the Brigade") and has some details of these operations, but they were mostly a minor sideshow to the landings on the west side of the island.
Copp's book about the entire NW Europe campaign is called CINDERELLA ARMY:
Copp is a professor of history while Zuehlke's background is journalism.