If an anime has a manga, I'd pretty much always recommend reading the manga if you like the anime.
tbh, reminds me of how I tried to read the Ghost Hunt manga since the anime only had the one season. Since it's a shojo, the format kinda made it difficult to follow at times. I might try to revisit it at some point. Granted, it looks like both the show and manga were based on a light novel series and, while the manga goes further than the show, it seems like it probably doesn't go further than the light novels so... I guess I'm kinda screwed regardless?
Otherwise I'll mention that I've watched at least part of the Nodame Cantabile anime, the live-action version, and read a good chunk of the manga, all of which was pretty neat in its own way.
The Ghost Hunt anime is one of the few shows that was creepy. ---