Question: What nationality is the author of the book Dark Slayer ?

Context paragraphs:
Spike (IDW Publishing): Spike is a comic book series published by IDW Publishing.  Written by Brian Lynch, it focuses on the character of Spike, a main character in television series "Buffy the Vampire Slayer" and its spin-off, "Angel".  Uniquely, although this is a spin-off from IDW's larger , it also serves as a prequel to Dark Horse Comics' own "Buffy the Vampire Slayer Season Eight" comic book series.  As such, it is "canon" to the overall "Buffyverse" in which stories take place.  Although originally intended as an ongoing series, the "Angel" rights transfer from IDW to Dark Horse caused the series end after eight issues.

Viva Las Buffy!: "Viva Las Buffy!  is a comic book storyline based on the "Buffy the Vampire Slayer" television series that was published in "Buffy the Vampire Slayer" #51–54 by Dark Horse Comics.  It was reprinted in a trade paperback collected edition.

Christine Feehan: Christine Feehan (b. Christine King in California) is an American romance-paranormal writer.  She has published more than 40 novels, including five series, and numerous novellas since 1999.

Buffy the Vampire Slayer Season Ten: Buffy the Vampire Slayer Season Ten is the sequel to the "Season Nine" comic book series, a canonical continuation of the television series "Buffy the Vampire Slayer".  The series is published by Dark Horse Comics and ran from March 2014 to August 2016.

Buffy the Vampire Slayer Season Nine: Buffy the Vampire Slayer Season Nine is a comic book series published by Dark Horse Comics from 2011 to 2013.  It is the sequel to the "Season Eight" comic book series, a canonical continuation of the television series "Buffy the Vampire Slayer".  The "Season Nine" brand also incorporates a new "Buffy" spin-off series, Angel & Faith, and two spin-off miniseries "Willow: Wonderland" and "Spike: A Dark Place."  Each core series consisted of 25 issues and each miniseries consisted of 5 issues.

Buffy the Vampire Slayer Season Eight: Buffy the Vampire Slayer Season Eight is a comic book series published by Dark Horse Comics from 2007 to 2011.  The series serves as a canonical continuation of the television series "Buffy the Vampire Slayer", and follows the events of that show's final televised season.  It is produced by Joss Whedon, who wrote or co-wrote three of the series arcs and several one-shot stories.  The series was followed by "Season Nine" in 2011.

Dark Slayer: Dark Slayer is the twentieth title in Christine Feehan’s Dark Series, a series of paranormal/romances featuring the Carpathians (race).

Angel: After the Fall: Angel: After the Fall is a comic book published by IDW Publishing.  Written by Brian Lynch and plotted with Joss Whedon, the series is a canonical continuation of the "Angel" television series, and follows the events of that show's final season.  "Angel: After the Fall" was prompted by IDW Publishing and Joss Whedon after the success of Dark Horse Comics' "Buffy the Vampire Slayer Season Eight" which is the official comic continuation of "Angel"'s mothershow, "Buffy the Vampire Slayer".  "Angel: After the Fall" sees the heroic vampire, Angel, coping with the apocalyptic aftermath of the television series after he took over and subsequently betrayed the demonic law firm, Wolfram & Hart.  The city of Los Angeles has since been sent to hell by Wolfram & Hart as a result of Angel's actions.  The series follows his attempts to rescue the people he has sworn to protect.  The first issue was released on November 21, 2007.

Buffy the Vampire Slayer Season Eleven: Buffy the Vampire Slayer Season Eleven is the sequel to the "Season Ten" comic book series, a canonical continuation of the television series "Buffy the Vampire Slayer".  The entire season consists of only 12 issues, a much shorter run than the previous seasons.  The series was published by Dark Horse Comics and began on November 23, 2016.

Slayer, Interrupted: "Slayer, Interrupted" is a comic book storyline based on the "Buffy the Vampire Slayer" television series that was published in "Buffy the Vampire Slayer" #57–59 by Dark Horse Comics.  It was later reprinted as part of a trade paperback collected edition.  It was influenced by events detailed in the episode "Normal Again".  The title references the best-selling memoir "Girl, Interrupted", also about institutionalization.

Supporting paragraphs: Dark Slayer Christine Feehan
Answer: American