Cerrie Burnell

A young girl is rescued from a shipwreck, and is looked after by the sailors who saved her. A touching romance and moving adventure tale of love, family, friendship, and coming of age. -- from Google Books

Harper lives in the City of Clouds, an enchanting place where it rains every day and an umbrella is always a good idea. With her Aunt Sassy, her beloved cat, Midnight, and all of her neighbors in the Tall Apartment Block, every day is full of possibility. But when every cat in the city goes missing including Midnight Harper is determined to find all of the precious pets. And she ll need a magic, flying umbrella to help in her search.

A storm brings a floating circus to the City of Clouds, and when Harper and her friends attend they move ever closer to the secret of her origins.