It is a companion series to Gunn's The Christy Miller series, as Sierra's character was introduced in the twelfth book of Christy's series.
ATP International Series | World Series | Sierra Leone | Santa Cruz de la Sierra | World Series of Poker | ATP International Series Gold | Star Trek: The Original Series | ATP World Tour 250 series | Buffy the Vampire Slayer (TV series) | series | ATP World Tour 250 Series | Gossip Girl (TV series) | Casualty (TV series) | House (TV series) | The Twilight Zone (1959 TV series) | One Tree Hill (TV series) | limited series | Sierra Nevada | Lost (TV series) | Sierra Club | NCIS (TV series) | 90210 (TV series) | Sierra Nevada (U.S.) | The Outer Limits (1963 TV series) | Sprint Cup Series | Monk (TV series) | Angel (TV series) | The Avengers (TV series) | Top Gear (2002 TV series) | Heartbeat (UK TV series) |