| 1 | As Piscean mothers are born daydreamers and live in the world of fantasy. | |
| 2 | The books are full of lyrical prose that bring to mind Tolkien style fantasy. | |
| 3 | Vivid colors and bizarre shapes come together in an image that could be an imaginative illustration for a fantasy story. | |
| 4 | Terry Pratchett's Discworld might not have the gravitas of other fantasy works, but it makes our list by virtue of being pure fun. | |
| 5 | The books are rare in the fantasy genre in that they have invited serious analysis and literary criticism. |