There is also Blood and Gold, which takes place just after Queen of the Damned. Merrick, which I've struggled to get into, Blood Canticle, and I've forgotten the rest of them...
Some of Interview was ok, but I didn't totally buy Tom Cruise as Lestat, or Brad as Louis if I'm honest. They didn't really capture the grace of the books, there was no subtlety, the hints that you got in the books, and the insight into the thoughts and reasons of the vampire actions. I know that you can't reproduce the books into a film but this is just another reason that either some books shouldn't be made into films, or just that the wrong directors were used