All About Baby Zoo Animals series is perfect for your library - both school and public.
Young animal lovers will snap these up! The pictures are super cute and each photo corresponds with a page of text. There are a few vocabulary words explained, a short book list for more books, and a few websites for additional information. The text isn't overwhelming and gives a great introduction to the animals - including their habits, their relationships with their parents and siblings, how they grow, and what they eat.
I bought six titles for my library and I think these will fly off the easy reader shelves.