Can someone tell me the name of this book? Its about a young woman and a unicorn.?

Is it Black Unicorn?

Copied from Amazon:

Grade 7-12-- Tanaquil may be the daughter of a sorceress, but she can't do any magic--or so she thinks--and she finds life in her mother's castle very dull and lonely. Her one skill, that of mending things, leads her to piece together a pile of old bones found in the desert and unknowingly bring back to life a black unicorn that needs Tanaquil to help it return to its own, more perfect world. In the process of doing this, Tanaquil finds a sister, and discovers what her own powers really are. The plot of The Black Unicorn is in no way as simple as this description. It is complex and twisting, and while readers may not be sure where they're going, they'll never be bored. Lee's lush and highly visual style and her down-to-earth sense of humor are a constant entertainment. Her imagination is boundless, whether in recreating the life of desert nomads or describing a castle full of magical devices all gone slightly awry.

There is a ebook that I learn decades in the past titled "The Last Unicorn" via Peter S Beagle. I do not don't forget that there was once a flood, however it is feasible. Anyway, it was once an pleasurable ebook and I could endorse it.