In early interviews Niall Horan said he had only read one book. Which American classic by Nelle Harper Lee was it?

Explanation

Niall Horan (13th September 1993) is the only Irish band member of One Direction and is known as "The Funny One". He is left-handed but plays the guitar right-handed. The manager of One Direction had Niall get braces in late 2011, because his front teeth were crooked. Niall was born in Mullingar, Ireland, and his parents separated when he was young. His first pets were two goldfish named Tom and Jerry. If he wasn't a singer he would want to be a dentist or a sound engineer.