The Secret Night World of Cats — Helen Landalf

When her cat goes missing on a moonlit night, Amanda climbs out her bedroom window and enters a magical world filled with unusual cats. She travels through the city, into a starlit meadow, and into a forest, where at first she thinks she has found her beloved Tabby. She joins the cat and hundreds of others in a joyful dance but runs away once she discovers the cat isn't really hers. Eventually Amanda is reunited with her furry friend.