"That" is famous for being able to be repeated five times and still be grammatically correct, as in the phrase: “They say that that 'that' that that person said sounded dodgy".
harry potter
artemis fowl
terry pratchett
philip pullman
a series of unfortunate events
the chronicles of narnia
neil gaiman
anthony horowitz
james patterson
eragon
dan brown
the doomspell trilogy
suzuki koji
the magister trilogy
tamir triad
鋼の錬金術師
BLEACH
デスノート
桜蘭高校ホスト部
コードギアス 反逆のルルーシュ
D.Gray-man
涼宮春日の憂鬱
機動戦士ガンダムOO
SOUL EATER
マクロスF
地球へ...
ゾンビローン
夏目友人帳
Chäos;HEAd
黒執事
Darker than BLACK -黒の契約者-
さよなら絶望先生
07-GHOST
化物語
ライアーゲーム