Rivers of London is an amazing series for casual representation. Lemme list the ones I can remember:
biracial trainee wizard and all around nerd as a protagonist whose dad is white British and whose mother is from Sierra Leone - this includes all the lovely background and cultural heritage details that slip in there too.
the genus loci of the Thames within the city being a reborn Nigerian woman, because the white men who were the original genus locii didn’t want to deal with the mess of pollution and cack and so the river called and the woman who is Mama Thames answered
Which leads to said the ‘daughters’ (tributaries) all being a fantastic and diverse collective of dark-skinned women and girls (and Lea, a twinset and pearls sort) - I’ve lost count. There are at least six.
a ginger Scottish Muslim (think Kevin McKidd)
a happily married lesbian police officer
a Somali-born hijab-wearing Police Detective
our protagonist’s mother
a biracial, potentially supernatural teenage lesbian
a trans lady of African descent (I can’t recall if it’s confirmed where she was adopted from)
One of the things that also really stands out is that when our narrator describes people physically, he mentions when characters are white. We are so conditioned by the media to assume that everyone is white that generally only POC are described by their skin tone to differentiate from the ‘norm’, but Rivers of London is so good at reminding you that no, this is not a white lead and yes, white people can be described by their skin tone as well.
If you haven’t read these books, you really should. It’s Harry Dresden meets The Bill led by the loveliest and most curious nerd I have ever seen committed to print (and yay, Ravenclaw!). Seriously, the number of geek references make me kittenroll :D