Carman;
The URL below will take you to the website of the Museum of the Regiments in Calgary, the PPCLI Museum is part of this.
You should be able to order on-line from this website a copy of their Regimental History for WWII, which is: Princess Patricia's Canadian Light Infantry 1919-1957, by G.R. Stevens.
The book, Once A Patricia is an excellent book also.
Hope this helps.
www.nucleus.com/~regiments
Cheers