Kinokuniya USA - "Hanako-san, Hanako-san... are you there?" I wish Kinokuniya would allow special orders for "Aida Iro Art Book: Toilet-Bound Hanako-kun" in Japanese! You are in luck! Special order the art
Beginning of Toire No Hanako-san (2011) - IMDb
Shinsei toire no Hanako-san - AsianWiki
Toilet-bound Hanako-kun (English Dub) Hanako-san of the Toilet - Watch on Crunchyroll