ID,parent_ID,name
10,,Fiction
11,10,Drama
12,10,Poetry
13,10,Fantasy
14,10,Science Fiction
15,10,Romance
16,10,Mystery
17,10,Thriller
18,10,Dystopia
19,10,Fairy Tale
20,,Non-Fiction
21,20,Biography
22,21,Autobiography
23,20,Essay
24,20,Speech