//EDIT: I know someone is going to be up in my business and say, " Y U POST DIS IN DIS SECTION?!?!" Allow me to explain, m'dear; Touhou is mainly famous due to the doujinshi (which can be found in BOOK FORM) as well as their music.
Is anyone into the games? The fan-made doujinshi? The music? I know I am; I've been hooked for about a year. In fact, Patchouli Knowledge inspired my username. If not, it's definitely something to look up.