Кошачья школа: Тайна хрустальной пещеры

Few people know that when cats reach 15 years old they leave human homes and go the the Cats' School where they learn magic. Yves, our feline hero, meets Valentinka and Mesan at the school, but none of them suspect the danger they are in. Something evil was imprisoned in the nearby caves years ago and is about to break free. First volume in the 'Cats' School' series.