The writer is a noted classical scholar and "scholarly" is indeed the term I would choose for this work. It is for the enthusiast or professional, in no way an 'introduction to the War Poets'. While no single volume could be comprehensive, Professor Vandiver stuffs her book with as much information as possible. She (fortunately) does not stick to her stated plan, which is to concentrate on three poets nor to her threatened polemic (that scholars misinterpret the evolution of WW1 poetry---it is not toward greater pity, pacifism or insight, but remains often patriotic, etc). She ranges over many poets with some great insights and nice analysis. Although she correctly shows that poetry could continue a patriotic or jingoistic voice, I think she herself found that the best poets did move away from these sentiments and celebrating heroism is not the same as jingoism. And while, yes, she concentrates on 3 poets, she continually diverges into other poet's works and the entire history of classical influence on England, its public and private schools, university students and the general public.
Her scholarship, use of manuscripts and close study of her chosen poets' correspondence, libraries and every possible source of information is remarkable. I think she worries about small issues too much at times (eg: not having proof Wilfred Owen knew the Iliad or Aeneid since we can't find them in his letters or library), but overall the range of her subject and the detail is superb. Although I disagree occasionally with some of her interpretations or think she is too selective about some poets (leaving out some works that might weaken a point of argument), I think there are no comparable sources to Classical influence on the War Poets and indeed, England in the early 20th Century. Her classical knowledge is smooth and serene and this book appears about as complete as a one-volume work can be.
I might add that Prof Vandiver writes prose very well, much better than in most academic works falling my way---this tome is a real pleasure. This is a niche book, but would suit anyone who wishes to know more about the British WW1 poets, classical influence in Western Lit or to study a unique stance in the psychology of England heading into and through the Great War.
I add that it is well referenced, a fine take-off point for further detailed study.