It's just an orphan penguin with two daddies. Why can't people let it alone?  Once again, "And Tango Makes Three," the award-winning children's book, has topped the American Library Assn.'s list of most frequently challenged books, announced Monday. "And Tango Makes Three" tells the true story of two emperor penguins at New York's Central Park Zoo who hatched and parented a baby chick. What about the book has gotten feathers ruffled? The emperor penguins were both male.  Written by Peter Parnell and Justin Richardson and illustrated by Henry Cole, "And Tango Makes Three" has spent five years on the most-challenged list. For 2010 it again took the top spot. The library association writes that objections to the book include it being deemed "unsuited for age group." "Religious viewpoint" and "homosexuality" have also been cited as reasons for challenging the book.  Other books that appear on the 2010 list are "Brave New World" by Aldous Huxley, "The Absolutely True Diary of a Part-Time Indian" by Sherman Alexie, "The Hunger Games" by Suzanne Collins and Stephenie Meyer’s "Twilight." The complete top 10 -- and the chief objections to them -- is after the jump.  1. "And Tango Makes Three" by Peter Parnell and Justin RichardsonReasons: Homosexuality, religious viewpoint, unsuited to age group2. "The Absolutely True Diary of a Part-Time Indian" by Sherman AlexieReasons: Offensive language, racism, sex education, sexually explicit, unsuited to age group, violence3. "Brave New World" by Aldous HuxleyReasons: Insensitivity, offensive language, racism, sexually explicit4. "Crank" by Ellen HopkinsReasons: Drugs, offensive language, sexually explicit5. "The Hunger Games" by Suzanne CollinsReasons: Sexually explicit, unsuited to age group, violence6. "Lush" by Natasha FriendReasons: Drugs, offensive language, sexually explicit, unsuited to age group7. "What My Mother Doesn’t Know" by Sonya SonesReasons: Sexism, sexually explicit, unsuited to age group8. "Nickel and Dimed: On (Not) Getting By In America" by Barbara EhrenreichReasons: Drugs, inaccurate, offensive language, political viewpoint, religious viewpoint9. "Revolutionary Voices" edited by Amy SonnieReasons: Homosexuality, sexually explicit10. "Twilight" by Stephenie MeyerReasons: Religious viewpoint, violence  Banned Books Week: It's back
Why does everyone pick on the penguins? And Tango Makes Three tops list of most-challenged books. Also in the top 10: Sherman Alexie's National Book Award winner and mega-bestseller Twilight.