Naruto Novel: Shikamaru's Story (novel)

Two years after the Great Ninja War, Shikamaru spends his days racing around, hands full as one of Konoha’s key protectors. Then, large numbers of ninja from every region are reported missing. Even Sai disappears. And the place where the missing shinobi end up is the mysterious empire, the Land of Silence. As a ninja, as an adult, to protect all that he is responsible for, Shikamaru must do battle with the shadow of a new generation.