The Lost Fairy Apple Tree, The Magic Key, The Unicorn, The Star Cloak, The Water Sprites, The Peskie Spell, The Rainbow Wand (Fairy Realm, Volumes 4, 5, 6, 7, 8, 9 and 10)

These are books 4-10 in the Fairy Realm series by Emily Rodda, RL3 ages 7-10, hardcovers (no jacket as issued) from harper collins 5.25 x 7.25", about 120p each, first edition, occasional illustrations.