Here there be dragonnes - Mary Brown

THE RING'S THE THING ... Thing was a young girl who hid beneath a mask. Her companions included a crow, a toad, a goldfish, and a kitten. Never had a more unlikely band of unheroic heroes set off on a difficult and dangerous quest. But Thing had a ring with unusual powers. . . . Summer was an orphan who only wanted to find a husband and settle down. But first she had to help out a blind knight with amnesia and a winged pig. But how to get those two, as well as a raggle-tail assortment of other creatures in distress, to the far-distant place where they belonged? Summer owned almost nothingexcept a certain magic ring. ... Sophie was cast adrift in London by the untimely death of her parents. Then an uncle left her a legacy that would lift her up from povertyif she took a dragon's egg into uncharted Asia. The task was daunting and time was short, but her late uncle had also left her a very remarkable ring. ... Three very unusual heroines in widely separated eras, each wearing for a time a ring made from a unicorn's horn, a ring with extraordinary powers. . . .