How Science Is Tackling Unconscious Bias
This was well written, not too complicated and not too dumbed down.
A lot is covered, not sure that any one book could cover everything but this is a very manageable volume of about 80 pages that then lists good resources and a page of further reading.
Very much a Western lens, talking about America & Canada, Australia & New Zealand, and Europe.
Although there is a study mentioned from Tel Aviv University about babies and race with part of the trial group living in Ethiopia and a section about Israeli and Palestinian kids going to a summer camp in the US called Seeds of Peace.