A good selection of World War One books can be found in the library, shelved at 940.3 and the links below list informative and reflective books on the same period.

http://www.lovereading.co.ukwww.lovereading.co.uk/genre/ww1/World-War-One.html

http://www.goodreads.com/shelf/show/first-world-war

and for fiction

https://www.goodreads.com/list/show/16966.ww1_historical_fiction