The Last Unicorn by Peter S. Beagle
"If men no longer know what they are looking at, there may well be unicorns in the world yet, unknown and glad of it."
Living in peace in her lilac wood, the Unicorn didn't know the world had changed, or that anything had happened to the rest of her kind. Overhearing a chance conversation, she resolves to venture out and discover the truth. The road is dangerous, and the risks are great. If she fails, then unicorns will be lost. Forever.
A modern fairy tale, The Last Unicorn is a beloved classic, voted by TIME as one of the 100 greatest fantasy novels of all time. It is fantastical, poignant, wistful and wonderous, showing us the humanity of magic, and the magic of humanity.