Touhou Project has grown to become quite a large multimedia franchise spanning from official video games, novels, mangas, artbooks and music CDs. There are also tons of fanmade stuffs such as music remixes, anime, fanarts, fanfictions, doujin mangas, fangames etc. It is quite difficult to get into the fandom out of nowhere because of the overwhelming amount of works of it. Here, I would recommend Forbidden Scrollery as a start to begin your venture into Touhou Project. In a familiar manga medium, Forbidden Scrollery is primarily about the wonders and mysteries of the world of Gensokyo. Through the eyes of a normal human, Kosuzu Motoori,we are introduced to the numerous existence of the other Youkai races that inhabit Gensokyo alongside humans - ranging from the Tengu, Tanuki, Kappa, and many others.

Many of the prominent characters of the Project also make their appearances, and the manga did a good job giving them sufficient panels so the readers would know who they are. Some of the most powerful beings in Gensokyo are present, such as the gap youkai Yukari Yakumo, the vampire Remilia Scarlet and the mask youkai Hata no Kokoro. From here, the reader will be able to have a good grasp on some of the characters and this will serve well as a stepping stone to get into the franchise.

If you ask me what genres do Forbidden Scrollery belong to, here they are - Fantasy, Supernatural and Mystery. Gensokyo is a fantasy world where supernatural beings and occurrences belong. A huge part of the plot is about mystery, such as solving the mystery of sounds heard in the middle of the night (turned out to be animated objects walking around at night), or some mischievous Youkai causing trouble to the human villagers that needed extermination. It is quite a straightforward read, while it may be dialog-heavy sometimes, which helps to build the world and characters for the readers, overall the plot isn't overly complicated and it certain doesn't drag.

While Touhou Project is officially a danmaku shooting game (mostly), there isn't much action to represent the game. Instead, we get something more akin of a slice-of-life drawing style, featuring Moe Harukawa who has the art style of drawing the Touhou girls in a rather cute fashion (you can see some of them from MAL directly). Meanwhile, the granddaddy behind Touhou Project, the great ZUN himself, is penning the story for the manga.

All in all, I would say Forbidden Scrollery serves as a great introductory medium to the Project. There's nothing groundbreaking or epic to be expected while reading it, instead, you will be given a delicious trip into the wondrous world of Gensokyo itself.