I just wondered if anybody is interested in some online books I have noticed on www.archive.org just click on "Texts" and then search for a title or subject.
So far I have found;
The Fifth Army in March 1918 by W.Shaw Sparrow
History of the Great War, Military Operations, France & Belgium 1914, Brigadier-General JE Edmunds
The Territorial Divisions 1914 - 1918, Major J Stirling, 8th Btn Royal Scotts
The Despatches of Sir John French 1914
The Somme Vol II, The Second Battle of the Somme (1918) Amiens-Montdidier-Compiegne
The History of the 16th, The Queens Light Dragoons (Lancers) 1912-1925 by Col Henry Graham
British Regiments at the Front Reginald Hodder, The Story of their Battle Honours
54th Infantry Brigade 1914 - 1918
I think they are out of copyright or something like that so they appear to be freely available, certainly to read online.
There's probably a lot more, its worth a search.
Regards
Adrian