I first saw it in a library as a kid, after it had been out a few years. And remember, these are the days before VCRs. Anything that transports you into the Trek universe, like this, or those awesome fotonovels, were a big deal, just as Starlog magazine was a big deal. You had to wait for reruns. You couldn't just dial in any episode on demand like today or come to a forum like this and get every nerd question answered. That really set the stage for ancillary material like this to be popular.