One of Sharp's five top books about trolls, as shared at Tor.com:
BeowulfRead about the other entries on the list.
My friends and I turned this one into a comedic movie for a ninth grade school project. Making it was some of the most fun I’ve ever had—we all got A’s. Though it’s a topic of much debate among those who debate such things, Grendel, Grendel’s Mother, and even the dragon can be viewed as trolls. Grendel coming to Heorot to destroy the hall because of the din made there is akin to the Scandinavian belief that early church construction and bell ringing was often met by troll attack. Grendel is the consummate troll in appearance and action, but his mother is just as iconic in her representation as a powerful shape-shifting trollhag capable of birthing monsters—just as Angrboda birthed Jormungand, Fenris Wolf, and Hel in Norse myths. (These vengeful and powerful beings laid further foundation for the trolls I sought to emulate.)
Beowulf is among four books that changed David Vann and Thomas Asbridge's top ten knights in literature.