I was actually surprised when I first dug into 'Hyouka'! While the anime adaptation by Kyoto Animation is gorgeous, the original source material is actually a light novel series by Honobu Yonezawa. There *is* a manga adaptation, but it’s not the main attraction—it’s more like a companion piece that started serialization in 2012, around the same time as the anime aired. The manga follows the novels pretty faithfully, but honestly, it lacks some of the anime’s subtle visual storytelling, like those iconic color-coded energy-saving moments for Oreki.
If you’re craving more 'Hyouka' after finishing the anime, I’d recommend jumping into the novels instead. The manga’s art is pleasant, but it doesn’t expand the story beyond what’s already covered. Still, it’s fun to see the Classic Literature Club’s mysteries in a different format! Maybe I’m biased because I adore the anime’s direction, but the manga feels like a side dish rather than the main course.