One of her biographers, John Campbell, wrote of the book:
The book has its longueurs, but it is still by far the most comprehensive and readable of modern prime ministerial memoirs: partisan of course, but generally a clear and vivid account of her side of the arguments. Of course it aggrandises her role, exaggerates the degree to which she knew where she was going from the beginning, slides over her moments of doubt and hesitation and diminishes the role of most of her colleagues, aides and advisers. It is a shockingly ungenerous book, shot through with gratuitously withering comments not only about people like Michael Heseltine and Geoffrey Howe whom she had some cause to feel bitter about, but also about other inoffensive colleagues who had served her well. Only Willie Whitelaw, Keith Joseph and Denis are beyond criticism, plus of course Bernard Ingham and Charles Powell. Other officials are barely mentioned. Nevertheless The Downing Street Years is a good record.