The White Rose of Langley

If you would like to read another novel about Constance of York after digesting Within the Fetterlock, you could try The White Rose of Langley by Emily S Holt which is available through
Project Gutenburg.

I do have to warn you though that Ms Holt is a Victorian writer and her views about the Roman Catholic Church in particular are distinctly non-PC. (If you are wondering, all the 'good' characters are, or become, Lollards.) I should hate anyone to be offended.

It is, nonetheless, an interesting read in parts and you may enjoy comparing and contrasting her interpretation of Constance against mine.

Oddly enough, I can't think of any other novel that focuses on the House of York in its early years, though there are a number written around the Lancaster bunch.