And tango makes three - Richardson, Justin & Parnell, Peter

Softcover. Simon & Schuster. 2007. New condition. 

The heartwarming true story of two penguins who create a nontraditional family.

At the penguin house at the Central Park Zoo, two penguins named Roy and Silo were a little bit different from the others. But their desire for a family was the same. And with the help of a kindly zookeeper, Roy and Silo got the chance to welcome a baby penguin of their very own.