A decade-by-decade history of the Group of Seven's exhibitions, etc., There are lots of images of the paintings, and especially interesting, lots of images of pictures by less-often reproduced members of the group and also, by their various associates and/or enemies; so there's more of a context for the well-known paintings by Jackson, Harris, and such. (The book accompanies an exhibit held at the National Gallery of Canada, which has a particularly rich collection of Canadian painting of the first half of the twentieth century.) Charles Hills' text offer a knowledgeable view of the Group in the context of the Canadian art milieu of their time, so there's lots about criticism of their work by those who preferred more traditional styles, about the political machinations of the boards of galleries, and so on. Hill particularly focuses on sales as an indicator of reputation--and usually has to make the bleak point that hardly any sales resulted from the Group's exhibits throughout the twenties.
One of the painters whose work Hill includes is Prudence Heward, who exhibited in the Group of Seven shows in the late twenties and early thirties. This is Heward's charming but honest At the Theatre.