There are 24 books in Fruits Basket Series.
Premise : Tohru Honda has been living in a tent since her mother died in a car accident. Through a chance encounter, she ends up living with Yuki Sohma, her school's "prince", along with his relatives Shigure and Kyo.
Other series related to Fruits Basket Series are Fruits Basket Collector's Edition , Fruits Basket Another , 星は歌う / Hoshi wa utau and Tsubasa: Those with Wings .