Reddit mentions of The Unjust Society

I don't understand this title. Why "as recently"? That's not recently at all... Nor was the 1969 White Paper aimed at "ending poverty" as much as it was to "abolish the Indian Act and dismantle the established legal relationship between Aboriginal peoples and the state of Canada in favour of equality." Which is directly from the Wiki page that you linked.

It was also a terrible idea. It was so bad that it spurred First Nations peoples to organize against it, leading to the publication of Harold Cardinal's Unjust Society and Harold Adams' Prison of Grass. These two books shaped a generation of First Nations peoples to fight against the actions of the federal government.

First Nation? Second Thoughts by Tom Flanagan is probably the most representative book on the conservative (small c) view of Indigenous issues; I know some people have a negative opinion towards Flanagan, but this work is great by most academic standards and I think it's a must read for anyone interested in Indigenous issues.

Citizens Plus: Aboriginal Peoples and the Canadian State by Alan Cairns. This was Cairns response to the Royal Commission on Aboriginal's people. Again, I think it's a must read to learn more about the various perspectives about Indigenous issues.

Wasase: Indigenous Pathways of Action and Freedom by Taiaiake Alfred. Alfred is probably the most "extreme" in terms of his vision for Indigenous peoples in Canada, but he's a must read.

Unjust Society by Harold Cardinal. This book provides the greatest insight into why the White Paper was met with opposition from Indigenous peoples and to Indigenous issues in general (it's a little older, but if you were to read one book out of all the ones I recommended this would be it)

Governing from the Centre: The Concentration of Power in Canadian Politics by Donald Savoie. I haven't read this one yet (I hope to soon) so I can't speak to how it is, but I've been told it's a great book. It basically looks at how the federal government has become increasingly centralized into the PMO

EDIT: If you go to university/college and have free access to academic journals you should look in those. There are so many interesting articles and are less time consuming than books. Here's a directory of open access journals, but keep in mind not all of these journals are of "top quality"