Waters of the Moon: Book Eight Book

I like ERB's Moon stories ( they make up a trilogy ), although they are certainly not as well-known as his Tarzan or John Carter series. In The Moon Maid, Julian is the commander of a spaceship that blasts off for Mars, or Barsoom, after contact is made with the famous Virginian John Carter on the Red Planet. Unfortunately, the craft goes astray and the Earthmen make a landing, not on the moon, but inside it. In the lunar interior, they discover weird creatures and an alien civilization, and, of course, the Moon Maid.
I loved Burroughs' stories as a kid and still love to return to those strange and wonderful worlds that the Chicago-born author created! I just wish we could have found a moon maiden inside the Moon, although, I guess it's better-for her!-that we didn't.