Match the Books with Female And Male Gender and when you get 11 Books of Both
Journey Male & Journey Female = 1 Journey Book

Violet - Journey
AI - Journey

ZhangSheng - Chamber
Yingying - Chamber

YesMan - Wild
WildGirl - Wild

Juliet - Western
Romeo - Western

Overlord - Overlord 
Jugi - Overlord

Mr. Xu - Snake
Ms. White - Snake

LiangShanbo - Love
ZhuYingTail - Love

Nakamura - Osaka
Sayumi - Osaka

Rose - Atlantic
Jack - Atlantic

Linda - Dream
Joey - Dream

Lee - Venom
Yang - Venom