Eliza and the Flower Fairies (Fairy Door Diaries series)

Eliza of the Elves keeps a secret space behind the low door in her bedroom, where she stores treasured collections, books, stuffed animals, and a diary. Inside that crawl space is another tiny door. It transports Eliza to the Land of the Flower Fairies, a bright place where fairies sit on blossoms and new flowers appear when one is picked. Eliza’s visit leads to unexpected adventures.