The Moshling Book is a feature what opens when a moshling is caught, it can also be accessed by the zoo by clicking a moshling name. The Moshling book features a clear picture of a moshling, the habitat, likes, dislikes, bio and even species. The book also displays what moshlings are currently in your room. The book appears to be brown/greenish with gold-plated corners, you can also see multi-coloured (mainly purple) bookmarks.
An example of the book: Scrumpy's page.