Books

Chronological order
its better to read the released first but you can do it fine this is from old to recent
 * 1) Tale of 2 sisters
 * 2) Jewel
 * 3) Taggerwood
 * 4) Airfall
 * 5) Zorilla’s heart(story of teska)
 * 6) Darkness(a tale from zorilla)
 * 7) tranquility(zipper‘s adventure)
 * 8) the lost heir(zipper’s adventure)
 * 9) the forgotten princess(zipper’s adventure)
 * 10) Bloodbath (Zipper’s adventure)
 * 11) the final countdown(Zipper’s adventure)
 * 12) Beyond the stars (Ricotta!)
 * 13) secret down under(tale of zorilla)
 * 14) War of blood (Ricotta!)
 * 15) whisper in the woods(Ricotta!)
 * 16) Fallen heir(Ricotta!)
 * 17) Rat graveyard(ラット荒れ地)