And Tango Makes Three by Justin Richardson and Peter Parnell
Roy and Silo are just like the other penguin couples at the zoo - they bow to each other, walk together and swim together. But Roy and Silo are a little bit different - they're both boys.
Then, one day, when Mr Gramzay the zookeeper finds them trying to hatch a stone, he realises that it may be time for Roy and Silo to become parents for real.
And Tango Makes Three with illustrations by Henry Cole.
Imprint: Simon & Schuster
Publication Date: 07 July 2007
Format: Paperback, Picture Book