Used book – Hurlenfer, Évelyne Reberg, Rosy

Mrs. Bloyer, a charming old lady, hosts Gus the ghost, an incorrigible blunderer, in her home. It is very reluctantly that she agrees to go on an excursion to Hurlenfer Castle, where ghosts, apparitions and other spectres once lived... Once? Not quite. What if the arrival of Mrs. Bloyer and Gus woke up all these sleeping beings?