John McHugh's The Mother of Jesus in the New Testament (1975) is available on Archive.org (albeit, on 14-day loan at the moment). It is one of the best books on Mariology ever published (and from me, I hope that means something!):
https://archive.org/details/motherofjesusint00mchu
Of course, yours truly has written a volume on Mary, too:
Behold the Mother of My Lord: Towards a Mormon Mariology (2017)
