You were the one who taught me," he said. "I never looked at you without seeing the sweetness of the way the world goes together, or without sorrow for its spoiling. I became a hero to serve you, and all that is like you.

From 2003 through 2011 Beagle was involved in a financial dispute with Granada over nonpayment of contractually due profit and merchandising shares. Beagle's work as a screenwriter interrupted his early career direction as a novelist magazine nonfiction author and short-story writer. In the 1970s Beagle turned to screenwriting.

During the last twenty-five years he has won several literary awards including a World Fantasy Award for Life Achievement in 2011. His best-known work is The Last Unicorn (1968) a fantasy novel he wrote in his twenties which Locus subscribers voted the number five "All-Time Best Fantasy Novel" in 1987.