It's issues like this that make me miss the days of Dixon and Nolan most. They put Batman in the most exciting situations and made us see how Tim Drake's Robin was more than capable of handling the world of crime fighting. Especially since he had no idea where Batman was in this issue. The end is also interesting. The bad guy seems to have fallen to his end, and none of his gang can identify him if they wanted to. None of them ever saw him without his mask. Though he appeared again briefly in a Blackgate one-shot a couple of years later, we don't know if it was the same guy or someone else. He's made no other appearances I'm aware of since.
You can usually find this for $2-4 in comic shop back issue bins. It's definitely worth it.