▁a ▁mag ical ▁fish ing ▁net , ▁which ▁ha uls ▁him ▁into ▁the ▁human ▁world . ▁Jak ab ok ▁finds ▁himself ▁in ▁ 1 4 th ▁century ▁Europe , ▁where ▁he ▁has ▁a ▁series ▁of ▁often ▁com ical ▁advent ures , ▁sometimes ▁as ▁a ▁l one ▁travel er ▁and ▁sometimes ▁in ▁partners hip ▁with ▁a ▁more ▁experienced ▁and ▁powerful ▁demon ▁he ▁be fri ends . ▁ ▁Jak ab ok ▁reve als ▁the ▁means ▁by ▁which ▁he ▁became ▁imprison ed ▁in ▁the ▁book . ▁F inding ▁Heaven ▁and ▁Hell ▁locked ▁in ▁combat ▁over ▁Johannes ▁G uten berg ' s ▁first ▁printing ▁press , ▁he ▁then ▁disco vers ▁them ▁secret ly ▁meeting ▁to ▁determine ▁how ▁Heaven ▁and ▁Hell ▁will ▁divide ▁the ▁rights ▁to ▁various ▁forms ▁of ▁publication . ▁Disc over ing ▁Jak ab ok ▁e aves dro pping , ▁they ▁use ▁the ▁press ▁to ▁turn ▁him ▁into ▁the ▁book . ▁ ▁Through out ▁the ▁story , ▁Jak ab ok ▁repeatedly ▁tries ▁to ▁get ▁the ▁reader ▁to ▁burn ▁the ▁book , ▁first ▁by ▁asking , ▁then ▁by ▁ple ading , ▁then ▁b ri ber y , ▁and ▁finally ▁by ▁threaten ing . ▁After ▁real izing ▁that ▁the ▁reader ▁is ▁heart less ▁and ▁cold , ▁he ▁gives ▁up ▁on ▁asking , ▁and ▁reve als ▁that ▁doing ▁so ▁would ▁have ▁set ▁him ▁free ▁to ▁kill ▁the ▁reader . ▁He ▁ends ▁the ▁book ▁by ▁suggesting ▁that ▁the ▁reader ▁give ▁the ▁book ▁to ▁someone ▁they ▁hate , ▁and ▁war ns ▁them ▁to ▁be ▁c aut ious , ▁as ▁they ▁now