old world war 1 books (1-13 volumes)

Dear Sir,
When my mother died I received from her the full 13 volumes of “The Great War” the standard history
of the all-Europe conflict edited by H W Wilson printed in London by the Amalgamated Press Ltd between
1914 -1919 dependant on volume number.
I attached photos of these books in pristine condition

I also have Volumes 1 and 2 of Edward V11 “His Life and Times” edited by Sir Richard Holmes librarian
at Windsor Castle 1870-1906 author of Queen Victoria etc. These were printed in 1910 again by the amalgamated press

I wonder if you could inform me if many of these are still in circulation and if the have a value
Your comments would be most appreciated

Many thanks Andy Adams
18 Northumberland Ave
Market Bosworth
CV13 0RJ
07702 952006