While I haven't read any myself, Boss Fight Books has some books covering some individual games released within the last 20 years: https://bossfightbooks.com/

I'm guessing more recent years aren't covered as thoroughly because of the mystique of early gaming, when the internet either didn't exist or barely had any official content related to games. Back then, the public didn't really know anything beyond what magazines would print. Now you can easily follow a game and its staff from the initial reveal all the way through release and beyond. There aren't as many "secrets", and the documentation of everything is just a Google search away. And when it comes to the deep, behind-the-scenes stuff that doesn't make its way online, I don't think developers are too inclined to talk until there's more distance between the release and the present.