Seward's work was generally well received by critics as offering a balance of readability and modern scholarship.
The First Bourbon (1971), a biography of
Henry IV, founder of the Bourbon dynasty, was described by Dame
Veronica Wedgwood in
The Daily Telegraph as a "sympathetic and well balanced portrait, drawn with a vigorous enthusiasm suitable to the subject [...] a most enjoyable and useful biography of a great man."
History Today called it "An admirable book. Here a great success story [...] is not only told with much verve and pellucid readability, but above all is told from within the age itself."
The Hundred Years War: The English in France 1337–1453 (1978) was rated "a well written narrative, beautifully illustrated, and which takes into account most recent research. It is also a good read." in the view of Richard Cobb writing in the
New Statesman.
The New Yorker noted that "Mr Seward shows us all the famous sights of those roaring times [...] and illuminates them with an easy scholarship, a nice sense of detail [...] and a most agreeable clarity of style." ''Richard III: England's Black Legend'' (1983) proved controversial because of the author's rejection of the modern argument that Richard's "black legend" was no more than Tudor propaganda. Members of the Richard III Society took issue with Seward's description of the king as "a peculiarly grim young English precursor of Machiavelli's Prince".
A.L. Rowse, however, described the book as "a sensible, reliable account."
John Julius Norwich judged it "perhaps the best, and certainly the most readable, of recent biographies." In August 2014, the Folio Society published an updated edition of ''Richard III: England's Black Legend'' in the light of evidence from his skeleton. Seward argues that the savage way in which Richard was hacked to death demonstrates how much he was hated and that, with the proof of a deformity, this strengthens the case for
Shakespeare's portrait being not so far from the truth. Seward, a conservative
Roman Catholic, was strongly criticised by
Frank McLynn in
The Independent for credulity in endorsing such religious phenomena as the "
sun dancing" spectacle at
Fátima in Portugal and elsewhere. Other reviewers disagreed,
The London Evening Standard noting that
The Dancing Sun: Journeys to the Miracle Shrines (1993) "is not, however, a book of credulous modern piety, but an example of that much more interesting English literary genre, the journey as a means of personal discovery."
The Tablet concurred, observing that Seward had approached the subject as a sceptic but was "honest about the fact that his journey is also in part a search for reassurance for his own faltering faith" Reviewing
Renishaw Hall: The Story of the Sitwells (2015) in the
Sunday Times John Carey observed that of Osbert, Edith and Sacheverell Sitwell "Seward takes a sensible view of the trio's literary output, grading it second-rate at best", while observing drily that Edith's poetry "still has its admirers.".
The Literary Review noted approvingly that "Desmond Seward has written a revisionist history of those birds of brilliant plumage, the Sitwells." In 2019 Seward produced what was regarded by some critics as one of his best works,
The King Over the Water, a history of the
Jacobites. ==Bibliography==