There is a book entitled “Cain’s Legacy” - The Building of the Iron Ore Company of Canada, ISBN 0-9694838-0-5. It covers all aspects including the building of the railway. Not many photos just the history. Try your local library and/or Google search
Use a search engine as suggested. You can contact me at cdnorthshore@shaw.ca.
Trains magazine had a long article on the Q NS & L back when the road was new. Say 1960’s. I read it back then but cannot remember the year, let alone the month.