S . ▁release ▁On ▁May ▁ 1 1 , ▁ 2 0 0 6 , ▁U . S . ▁publish er ▁Tok y op op ▁said ▁in ▁an ▁interview ▁with ▁com ic ▁book ▁news ▁website ▁News ar ama ▁that ▁it ▁would ▁be ▁publishing ▁the ▁nov els ▁under ▁its ▁" Pop ▁F iction " ▁im print . ▁The ▁first ▁book ▁was ▁released ▁in ▁March ▁ 2 0 0 7 . ▁The ▁first ▁four ▁books ▁have ▁been ▁released ; ▁after ▁the ▁lic ens ing ▁rights ▁to ▁the ▁series ▁revert ed ▁to ▁K od ans ha , ▁the ▁English ▁publication ▁status ▁of ▁the ▁fifth ▁book ▁and ▁on ward ▁will ▁be ▁dependent ▁on ▁K od ans ha ▁USA . ▁ ▁An ime ▁adaptation ▁ ▁Plot ▁The ▁an ime ▁cast s ▁Y oko ▁Nak aj ima , ▁a ▁Japanese ▁girl ▁who ▁is ▁suddenly ▁transport ed ▁to ▁another ▁world ▁and ▁eventually ▁disco vers ▁that ▁she ▁is ▁the ▁em press ▁of ▁the ▁kingdom ▁of ▁Ke i , ▁in ▁the ▁role ▁of ▁the ▁main ▁character ; ▁however , ▁in ▁the ▁nov els , ▁Y oko ▁is ▁only ▁one ▁of ▁many ▁main ▁characters ▁and ▁her ▁story ▁is ▁focused ▁upon ▁in ▁only ▁two ▁nov els . ▁ ▁The ▁an ime ▁focus es ▁on ▁the ▁Kingdom ▁of ▁Ke i ▁and ▁the ▁events ▁surrounding ▁it . ▁Several ▁of ▁the ▁other ▁countries ▁are ▁introduced , ▁the ▁most ▁prominent ▁being ▁K ou , ▁En ▁and ▁Tai , ▁while ▁K you , ▁Hou , ▁S ai ▁and ▁Ry u u ▁play ▁a ▁minor ▁role ▁compared ▁to ▁the ▁other