Design context book, type specimen pages

I've had some more thoughts how to develop my context book a bit further. I decided there should be a fold-out spread for each typeface set out as a specimen sheet, as a sort of type assalt course: the layout is exactly the same so you can see how each typeface performs.

The thick black line through each spread is a continuation of my 'timeline' idea, examples of Gutenburg, Garamond and Gill sans