^Liddle and Lyth (2000) and Mukhanov (2005) are recent cosmology text books with extensive discussions of inflation. Kolb and Turner (1988) and Linde (1990) miss some recent developments, but are still widely used. Peebles (1993) provides a technical discussion with historical context. Recent review articles are Lyth and Riotto (1999) and Linde (2005). Guth (1997) and Hawking (1998) give popular introductions to inflation with historical remarks.