And Tango Makes Three by Justin Richardson and Peter Parnell
Plot Summary: 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 get the chance to welcome a baby penguin of their very own.
Youtube read aloud: https://www.youtube.com/watch?v=WyPjUa908hM
On the top 10 banned book list in 2018, this is a book about gay penguins raising a family. It is super cute with adorable penguin illustrations and a true story line. The text makes it very clear that being gay is not normal, but there is no discrimination or backlash depicted.