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Hi
Is it 68 pages ?

Physical book is 70 pages but you don't need to memorize the quotes on page 70 and there are five pages of notes and a number of reference ones.

The main book is pages 2- 51 (page 2 is the inside cover and certainly in the mock tests I took there were questions on this).
 
Go here and you will find everything about Canadian citizenship test and Canadian citizenship study guide.
Its an easy way to pass exam. Here you even can find Canadian citizenship practice test by chapter.
Here you can prepare yourself by practice tests and download Discover Canada in PDF and in MP3 formats.

Yes I'm not too sure if you /this site should be hosting your / their own copies of Discover Canada.
I did a test just out of curiosity, seemed okay. You want to be careful of spelling (ie: neighbourhood) though, we're aiming to be Canadians!