Yes, it was printed pre-World War II -- which makes it an invaluable book for any dance researcher.
There's information on nineteenth-century ballets here I doubt you'll find anywhere else, and by a man
who actually saw many of them in his childhood. It's hard to refute his informed and loving reviews.
And the praise he gives! The frontispiece photo is of Alicia Markova (see below) and the book is dedicated
to Lydia Lopokova, "In Friendship And Admiration." Obviously these two dancers gave him many hours of joy
with their artistry, and he returns the favor here by helping to preserve their memory.