These books offer positive and uplifting themes within the fantasy genre, and they have received high ratings and critical acclaim from readers and reviewers.:

1. "The Night Circus" by Erin Morgenstern - This enchanting tale of a magical competition and a love story has received high praise for its lyrical prose and imaginative world.

2. "The Name of the Wind" by Patrick Rothfuss - This coming-of-age fantasy novel is highly regarded for its engaging storytelling and well-developed characters.

3. "Howl's Moving Castle" by Diana Wynne Jones - A delightful and whimsical story with a positive tone that has charmed readers of all ages.

4. "Stardust" by Neil Gaiman - A beautifully written and enchanting fairy tale that blends romance and adventure in a fantastical world.

5. "The Ocean at the End of the Lane" by Neil Gaiman - A short but powerful fantasy novel that explores themes of childhood and memory with a touch of magic.

6. "Uprooted" by Naomi Novik - A highly-rated fantasy novel with a positive female protagonist and a unique magic system.