And Tango Makes Three
by Justin Richardson and Peter Parnell, illustrated by Henry Cole
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 astone, he realises that it may be time for Roy and Silo to become parents for real.