“And Tango Makes Three,” a children’s book about two male penguins raising a baby penguin based on the story of Central Park’s Roy and Silo, was moved from the children’s section to the nonfiction section of two Missouri public libraries because of the book’s “homosexual undertones.”

The book, by Peter Parnell and Justin Richardson, was moved from the children’s section at two Rolling Hills’ Consolidated Library’s branches in Savannah and St. Joseph in northwest Missouri.

Two parents had expressed concerns about the book last month.

Barbara Read, the Rolling Hills’ director, said experts report that adoptions aren’t unusual in the penguin world. However, moving the book to the nonfiction section would decrease the chance that it would “blindside” readers, she said.

More penguin blogging: “Parents complain that nonfiction account of penguins represents ‘homosexuality’ to children”