For those interested in the 4th Battalion’s history there is a document entitled Records of the Fourth Canadian Infantry Battalion in the great war, 1914-1918.
It is available in may formats such as PDF, Kindle etc. It would be a good starting place for those interested in researching the 4th Battalion.
War Diary of the 18th Battalion CEF 
Interested in 4th, 18th, 19th and 20th Battalions.