Book length or pamphlet length (10,000 words+) or otherwise notable biographies of the life of William Morris with considerable reference to his politics in chronological order
William Morris
How I became a socialist (1894) William Morris
https://libcom.org/library/became-socialist-william-morris
https://archive.org/details/gri_33125010841241
The Life of William Morris (1899) J. W. Mackail
(Socialist and friend of Morris)
https://libcom.org/library/life-william-morris-1899-j-w-mackail
https://archive.org/details/lifeofwilliammor11mack
Volume I
https://archive.org/details/lifewilliammorr03mackgoog
Volume II
https://archive.org/details/lifewilliammorr01mackgoog
William Morris and the Early Days of the Socialist Movement (1921) J. B. Glasier
(Socialist League then Independent Labour Party)
https://libcom.org/library/william-morris-early-days-socialist-movement-1921
https://archive.org/details/williammorrisand00glasuoft
William Morris: A Vindication (1934) R. P. Arnot
(Leninist - Communist Party of Great Britain)
https://www.marxists.org/archive/arnot-page/1934/03/morrisvindicated.htm
William Morris: Romantic to Revolutionary (1955) E. P. Thompson
1955 edition
(Leninist - Communist Party of Great Britain)
https://libcom.org/library/william-morris-romantic-revolutionary-1955-e-p-thompson
https://archive.org/details/in.ernet.dli.2015.234455
1977 edition
https://books.google.co.uk/books?id=20Y-CgAAQBAJ&printsec=frontcover
William Morris: The Man, The Myth (1964) R. P. Arnot
(Leninist - Communist Party of Great Britain)
https://www.marxists.org/archive/arnot-page/1964/wm-morris/index.htm
William Morris: The Marxist Dreamer (1978) Paul Meier
(Leninist - Communist Party of France)
http://libcom.org/library/william-morris-marxist-dreamer-1978-paul-meier
https://archive.org/details/william-morris-marxist-dreamer-paul-meier
The Political Writings of William Morris (1973) A. L. Morton
(Leninist - Communist Party of Great Britain)
https://openlibrary.org/works/OL47723W/Political_writings_of_William_Morris
William Morris' Socialist Diary 1887 (1981) Florence Boos
https://www.marxists.org/archive/morris/works/1887/diary/
Political Writings: Contributions to Justice and Commonweal (1994) Nick Salmon
https://openlibrary.org/works/OL15008078W/Political_Writings
William Morris: A Life for Our Time (1994) Fiona MacCarthy
https://openlibrary.org/works/OL2862235W/William_Morris
https://books.google.co.uk/books?id=rUqXBgAAQBAJ&printsec=frontcover
Comments
https://archive.org/details/w
https://archive.org/details/williammorrisand00glasuoft
William Morris and the early days of the socialist movement ; being reminiscences of Morris' work as a propagandist, and observations on his character and genius, with some account of the persons and circumstances of the early socialist agitation, together with a series of letters addressed by Morris to the author. With a pref. by May Morris
by J. Bruce (John Bruce) Glasier