There are 12 books in しゅごキャラ!/ Shugokyara! Series.
This series is complete with 12 volumes. Everybody at Seiyo Elementary thinks that stylish and super cool Amu has it all: But nobody knows the real Amu, a shy girl who wishes she had the courage to truly be herself.
Other series related to しゅごキャラ!/ Shugokyara! Series are Zombie-Loan , Rozen Maiden: 8 volumes , DearS and Shugo Chara-chan! .