Though The Hobbit and The Lord of the Rings sit at the forefront of J.R.R. Tokien’s expansive legendarium, there is one work that sits at the center of his expansive world. Published as chapter 19 of The Silmarillion, Of Beren and Luthien, also referred to as The Tale of Beren and Luthien is the beating heart of Tolkien’s mythology. It is perhaps his most important work, consistently developed over the course of his life. It is a true mythological epic, a story of good and evil, monsters and heroes, great treasure and constant peril. More than anything it is a powerful and moving tale of love, a showcase of its power, and a written testament to Tolkien’s own love. Of Beren and Luthien subverts traditional mythological expectations, and acts as a powerful thread that stretches beyond The Silmarillion, into The Appendices of The Lord of the Rings and Tolkien's life itself.
Baughn, Sam, "Love Conquers Death: Mythological Subversion and Emotional Triumph in “The Tale of Beren and Luthien”" (2022). 4610 English: Individual Authors: J.R.R. Tolkien. 26.