A Saucer Full of Secrets - Pam Henry - Bog

Alban the cat couldn't have known how his life would turn out as he lay abandoned in the snow that winter. But from the moment Sedu, a twelve-year-old foundling rescued him, it's been a whirlwind of magic and adventure! As members of the Tuath Dâe, the two are able to understand each other and venture from their monastery home near the Skelligs to discover the history of their ancestors. Thanks to the guidance of Brother Barnabus and their new mentor Cullan, the pair use a magical key to pass through a hidden doorway into the land of Tuath Dâe. There they are tasked with finding Four Treasures gifted to man centuries ago.