'Birmingham Canal Navigations - A cruising and walking guide', 1984, IWA Birmingham Branch subcommittee
It looks like Tim's online version doesn't exist any more.
It's a roughly A5 book with a blue cover and a plastic spiral binding and rare. If you can find a PDF version, you can print it out at A4 making it readable, put the pages into a more logical order and colour it in to make the diagrams easier to understand.
It takes a canal and describes it in a linear form listing all the lines, junctions, arms and wharfs