Castle Mountains - Part I: Trip to the Castle — C.K. Omillin

A boy named Alesdor discovers a penguin is his garden. A penguin! How is that possible? After Alesdor gives Zeppi the penguin his name and a home, the two become best friends and their adventures begin. - Book 8 - Zeppi is invited to spend his first vacation in Castle Mountains. He smuggles his best
friend into the train so she can be part of all the fun, too.