The Twelve Kingdoms Forum

there is actually 12 volumes and 8 story arcs :
2 volumes on taiki and the accsion to the throne of gyousou
1 wich talk of the life of taiki in modern japan
2 : where tyouko become empress of kei
1 : en-ou supress the rebellion in ghis kingdom
2 : the story of youko, suzu and syoukei and the ...

i can respond to a few questions :

for the novel ,
no fuyumi ono don't start to write again on juuni kokki
no you can't buy the novel in english
but but
there are a few sites of fans where you can find translations of parts of the novels in english and in french

in english :
here
on otakyu
http ...