Once Upon a Spring Morn — Dennis L. McKiernan

The national bestselling author of the Mithgar fantasies, Dennis L. McKiernan, returns to his enchanting seasonal fairytale cycle with a story of love, courage, and hope against the forces of darkness.
 
Once upon a spring morn in Faery, the gallant knight Roél rides into the Springwood and finds his true heart's desire in Céleste, princess of that domain. But before their love can blossom, Roél must rescue his sister from a dreadful lord who steals the souls of those he bears away.
 
Wishing to aid her champion, Céleste tells Roél of a city in which a mysterious map lies -- a map that may reveal the route to the dread lord's secret realm. Aided by the Fates themselves, who guide them in riddles they must first unravel, the princess and her knight follow their hearts on a desperate odyssey across shadow-lit borders to save Roél's soul-reft sister ere the dark of the moon.
 
“An enchanting tale that will have readers spellbound.” -- Midwest Book Review
 
“An inspired re-envisioning of two classic tales of love and adventure.” -- Library Journal