Felicity Hughes writes one of my favorite blogs about Madrid, about the history of places and things you don't find on normal tourist itineraries. She's also got a new book out, about Barrio de las Letras, and she's working on Lonely Planet's new Madrid guide (out in 2025). More about Madrid and Spain on my blog: https://expatmadrid.com/

And on Felicity's blog: https://themakingofmadrid.com/