Penguins Around the World - This site is filled with information on all different types of penguins.  It even has a lesson plan section and a slide show.

Pete and Barb's Penguins Pages - Filled with lots of information on penguins.  Includes book suggestions, photos, etc. 

Penguins - This site is sponsored by SeaWorld.

Monterey Bay Aquarium - Focuses on penguins, included is a FAQ section and a live Penguin Cam!

Penguin Planet - Features photographs and excerpts from a book by a wildlife photographer.  Included is a Kids' Corner with printables, links, and video of penguins in action!

Antarctica (Sunburst Book) by Helen Cowcher.
Information on this frozen environment.

Cuddly Dudley by Jez Alborough.
This lovable penguin tries to find some peace and quiet.

The Emperor's Egg by Martin Jenkins.
A delightful book on how the male Emperor Penguin incubates an egg.  

Looking at Penguins by Dorothy Hinshaw Patent.
Another good nonfiction book, best used as a reference.

Mr. Popper's Penguins by Richard Atwater.
This classic chapter book could be read over a longer unit on penguins.

The Penguin (Animal Close-Ups) by Beatrice Fontanel.
Good information.

A Penguin Pup for Pinkerton by Steven Kellogg.
This popular great dane attempts to incubate a football in his paws, after hearing how Penguins do the same with their eggs.

Penguin (See How they Grow Series) by Mary Ling.
A simple book on the development of a penguin.  Included are wonderful photographs of a penguin's growth.

Penguins! by Gail Gibbons.
A fantastic nonfiction book.  Filled with lots of interesting facts about penguins.

Penguins (Animals of the Ocean) by Judith Hodge.
A good nonfiction book about penguins.

Penguins by Lunn M. Stone.
A nonfiction book with chapters on Penguin Homes, Food, Enemies, etc.

Seven Weeks on an Iceberg by Keith R. Potter.
An appealing book filled with facts and photographs. 

Tacky Books (Series) by Helen Lester.
This series of books revolves around a penguin named Tacky.

These Birds Can't Fly (Rookie Read-About Science) by Allan Fowler.
Includes information on all flightless birds.

Whiteblack the Penguin Sees the World by Margaret Rey.
This book is brought to you by the much loved "Curious George" team.  It was not discovered until after the death of Margaret Rey, although it was written in 1937.  It is the story of a penguin who sets off to see the world in order to have stories to tell.