Red Unicorn

The enchanting, magical sequel to The Black Unicorn and The Gold Unicorn!

After several years traveling, Tanaquil — a sorceress like her mother with the ability to mend — returns home only to discover that her true love has been betrothed to her sister, Empress Lizra. Broken-hearted and jealous of her sister’s happiness, Tanaquil is lured by a red unicorn into a mirror world where she encounters Tanakil, a diabolical version of herself. She discovers also several new powers. Powers she will need to foil Tanakil’s sinister plot of revenge.

Tanith Lee is a British writer of science fiction, horror and fantasy. She is the author of over 70 novels and 250 short stories, a children's picture book (Animal Castle) and many poems. She has also written two episodes of BBC science fiction series Blake's 7. Lee is the daughter of two ballroom dancers. Despite a persistent rumour, she is not the daughter of Bernard Lee (actor who played "M" in the James Bond series of films of the 1960s). Tanith Lee married author John Kaiine in 1992.
Her career really took off with the acceptance in 1975 by DAW Books USA of her adult fantasy epic The Birthgrave. This was a mass-market paperback and Lee has since maintained a prolific output in popular genre writing. She was one of the Guests of Honour at Orbital 2008 the British National Science Fiction convention (Eastercon) held in London in March 2008.