I feel like all too often Houston is a city with no memory. Things happen here and people forget them immediately. Once a building is more than 20 years old, we bulldoze it and put up something new. I am interested specifically in 20th century Houston history. Thanks so much in advance.
Have you seen the Houston Area Digital Archives? You might have a nice time poking around the Archivists of the Houston Area webpage as well.
I don't know if this is the kind of thing you are looking for but I'm reading Daniel Yergin's The Prize which is a book on the history of the oil industry. I think every Houstonian should read it.