Young adult (YA) literature is a genre of fiction aimed primarily at readers aged 12 to 18. It often features teenage protagonists facing challenges related to identity, relationships, and personal growth. Themes in YA literature can include love, friendship, family dynamics, and social issues, making it relatable for young readers. The genre has gained popularity since the late 20th century, with notable authors like John Green and Suzanne Collins contributing to its success. YA literature is characterized by its accessible language and engaging plots, appealing to both young adults and older readers who enjoy coming-of-age stories.