▁supp lement ing ▁what ▁has ▁been ▁handed ▁down ▁by ▁histor ians ▁from ▁Western ▁and ▁Southern ▁Europe . ▁ ▁Books ▁ ▁The ▁six teen ▁books , ▁in ▁pro se ▁with ▁an ▁occas ional ▁exc urs ion ▁into ▁poetry , ▁can ▁be ▁categor ized ▁into ▁two ▁parts : ▁Books ▁ 1 - 9 , ▁which ▁deal ▁with ▁Nor se ▁myth ology ▁and ▁semi - legend ary ▁Dan ish ▁history , ▁and ▁Books ▁ 1 0 - 1 6 , ▁which ▁deal ▁with ▁medieval ▁history . ▁Book ▁ 9 ▁ends ▁with ▁G orm ▁the ▁Old . ▁The ▁last ▁three ▁books ▁( 1 4 - 1 6 ), ▁which ▁describe ▁Dan ish ▁con quest s ▁on ▁the ▁south ▁shore ▁of ▁the ▁Balt ic ▁Sea ▁and ▁wars ▁against ▁S lav ic ▁pe op les ▁( the ▁Northern ▁Cr us ades ), ▁are ▁very ▁valuable ▁for ▁the ▁history ▁of ▁West ▁S lav ic ▁tribes ▁( Pol ab ian ▁S lav s , ▁P omer ani ans ) ▁and ▁S lav ic ▁pag an ism . ▁Book ▁ 1 4 ▁contains ▁a ▁unique ▁description ▁of ▁the ▁temple ▁on ▁the ▁island ▁of ▁R ü gen . ▁ ▁Over view ▁ ▁Book ▁ 1 ▁ ▁The ▁first ▁book ▁is ▁mostly ▁Sax o ' s ▁original ▁work , ▁sharing ▁little ▁with ▁other ▁primary ▁works , ▁but ▁taking ▁some ▁insp iration ▁from ▁An cient ▁Greek ▁ep ics . ▁It ▁very ▁briefly ▁covers ▁the ▁rule ▁of ▁the ▁e pon ym ous ▁founder ▁of ▁the ▁Dan ish ▁nation , ▁Dan , ▁but ▁also ▁his ▁sons ▁Hum