#OTD in 1954.
The Fellowship of the Ring, the first part of J. R. R. Tolkien's novel The Lord of the Rings, was published by Allen & Unwin.
A dispute with his publisher, George Allen & Unwin, led Tolkien to offer the work to William Collins in 1950. Tolkien intended The Silmarillion (itself largely unrevised at this point) to be published along with The Lord of the Rings, but Allen & Unwin were unwilling to do this.