At the center of The Lord of the Rings is the unbreakable friendship between Frodo Baggins and Samwise "Sam" Gamgee, lovingly played by Elijah Wood and Sean Astin in the epic movie adaptations.

Frodo and Sam's journey across Middle-earth is a long and physically exhausting trek over some dangerous territory. And part of what makes their adventure so compelling is the simplicity of it, as ...