They were called The Handy Handbook and were given away free with the Evening Telegraph.
As well as the calendar inside, they also had bits & pieces of general information about Dundee such as local services, holiday dates, football fixtures and so on, with an occasional household hint thrown in.
Each one also had a view of the city on the back page, a variety of which are on display above.
The books in shot date from the 2nd half of the 50's, right through to 1969. I'm not too sure if this was the end of the line or if they kept it going in the 70's, but they do make for a very nice collection when grouped together.
Big thanks to Bridie.