The document discusses definitions and characteristics of young adult (YA) literature. It provides 3 definitions: 1) Books written for teenagers dealing with issues they face, 2) Anything teens read of their own free will, and 3) Any book marketed as YA by a publisher. It also notes that YA literature typically features a teenage protagonist and explores themes of identity, relationships, and independence through a variety of genres. The document advocates analyzing literature through different "prisms" or lenses to discover its full spectrum of content and meaning.