Gossie & Gertie by Olivier Dunrea is the standout title in a charming series about several goslings. While all of the books in the series are excellent, I particularly like the way Gossie and Gertie's friendship is portrayed in this book. The illustrations are adorable and the text is simple and repetitive, which toddlers love. There are also a few lift-the-flap books in this series which are fantastic too.
Also Try: Duck and Goose by Tad Hill Little Pea by Amy Krause Rosenthal Olivia by Ian Falconer