It's tempting to throw up your hands reading this book. And not entirely because it was written around 1990 -- before the scandals/divorces/fires/deaths and recent weddings cast a new light on the royal family. The 1990s changed so much about the royal family, a book set before that era feels hopelessly out-of-date today.
What makes it aggravating is that it is not, despite the title, an exploration of the story of Elizabeth and Philip. Yes, they are both in there a lot, but really this is a book about the life of the queen, with Philip tossed in a lot, yes, but then you can't really write a biography of the queen and not talk about him.
I do give the book credit for covering a lot more of the politics of the day than is typical, a close reminder of how the queen's personal life and political role are inseparably important in her life. Many biographies of her fail to highlight the contextual political situation well.
But I suspect politics plays a large role because of how the book was researched. It appears that Higham went through newspapers, day by day, year by year, and compiled a book essentially telling the story of what was reported about the Queen day by day and year by year. You frequently see phrases such as "the Queen Mother was in the news that year for ..." or "Philip made headlines that month by ..." It starts to feel like you're getting a daily report of where the Queen went each day, what she ate, sometimes even what she wore. It's like a daily newspaper briefing put into a book format.
I will admit there are some advantages to this -- it's one thing to say "the Queen undertook xx state visits abroad that year," but another thing to actually recount month by month where she was going and really see how frequent and tiring her travel must have been. You also get to see how personal and family issues are constantly popping up when there are important state visits and ceremonial duties going on.
But the disadvantage of this approach is that you get no sense of overall narrative. It is so packed with details and comings and goings that it's hard to see the big picture. The phrase "can't see the forest for the trees" kept coming to mind.
On a personal note, I found the author's commentary more often opinionated and rude than insightful or thoughtful (Sarah Ferguson is described as "pushy, forceful" and he notes, "she was certainly not a beauty").
There have been other, more up-to-date and more insightful biographies of the Queen since this one. I'd hesitate to recommend it, other than to someone looking for a snapshot of how she and the royal family were viewed circa 1990.