Beowulf and the illusion of history

"Students of Beowulf have usually agreed either that the poem's minor episodes are more or less records of incidents in Scandinavian history or at least that they entail nothing of the fabulous or monstrous. Beowulf and the Illusion of History, however, argues that just as in the main episodes of the poem, monsters are present in certain minor episodes: the Finn Episode, the briefly mentioned fight of the hero with Daeghrefn, and (possibly) the accounts of the fight with Ongenpeow."--Jacket.