Nim's Island: Nim's Friends Book

Anything can happen on Nim's Island, a magical place ruled by a young girl's imagination. Young Nim lives alone on an undiscovered tropical island with her scientist dad. Her only friends are imaginary literary figures (Alice in Wonder land, Huck Finn) as well as animals from the island (a sea lion, an iguana, a sea turtle). Nim's life mirrors that of her favorite literary character, Alex Rover, the world's greatest adventurer. But Alexandra, the author of the Alex Rover books, is an agoraphobic living in San Francisco. When Nim's father disappears from the island, a twist of fate brings Nim together with Alexandra. They must find strength in one another to conquer Nim's island.