Bad Blood is a 2000 work blending collective biography and memoir by the Anglo-Welsh literary critic and academic Lorna Sage.

Set in post-war North Wales, it reflects on the dysfunctional generations of a family, its problems, and their effect on Sage.

It won the 2001 Whitbread Book Biography of the Year seven days before Sage died of emphysema.

[2] On Bookmarks, the book received a (4.0 out of 5) based on critic reviews with a summary saying, "It is a memoir that, as the Library Journal writes, “stands up to the very best".

"[4] The Guardian ranked Bad Blood at number 89 in its list of 100 Best Books of the 21st Century in September 2019.