The magical upside-down plant

"The magical Upside-Down Plant, a black stone flower that poisons everything it touches and turns good to bad and bad to good, has been discovered again. Many, many years ago, the Midnight Fairy, when she was Fairy Queen, broke its evil powers with a spell and buried it, hoping it would never be seen again. Meanwhile, Garton has stolen the fairies precious Plant Spell Book, and recognises the poisonous flower in the book. Not being able to read himself, he kidnaps Goodewin the Gnome Wizard and touches him with the plant Goodewin changes instantly and uses his wizardry for evil instead of good and teaches Garton to read. Garton then uses the black plant to upset all the flowers in the Scented Hills and ruin any magical fairy potions, and the fairies can no longer heal the sick animals in Faraway Island. On looking into Goodewin's crystal ball Astara's fears are confirmed the fairy Plant Spell Book is in Garton's possession and he is using it against them. She realises it's time to call on the Midnight Fairy for help. The Midnight Fairy tells Astara that a spell involving the milk of a rare, shape-shifting creature called the lamia can undo the bad magic of the flower. After a frightening struggle, Astara bravely uses a golden chain to capture the lamia and it gives them her milk. They make a spell with the milk and rescue Goodewin and fix all the damage caused by the terrible plant."--Provided by publisher.