Question: Christopher Ralph played the role of Tobias in a 1998 series based on a book series by what author?

Context paragraphs:
Bionicle Legends: Bionicle Legends is the third book series based in the Bionicle universe.  It had ended in 2008 and was succeeded by a new, final 3-book series, titled "Bionicle Super Chapter Books".  Bionicle Legends covered the events that occurred in the storyline's 2006–2008 story arc.  It follows the "Bionicle Adventures" series; but as "Adventures" is almost exclusively told in flashbacks, the events preceding those in "Legends" are told in the first book series, "Bionicle Chronicles".

Chris Perez (baseball): Christopher Ralph Perez (born July 1, 1985) is an American former professional baseball pitcher.  He pitched collegiately for the University of Miami, and was selected by the St. Louis Cardinals in the first round (42nd overall) of the 2006 Major League Baseball Draft.  Perez also played for the Cleveland Indians and Los Angeles Dodgers.

Alice-Miranda: Alice-Miranda is a fictional main character in a children's book series of the same name.  The Alice-Miranda book series chronicles the adventures of a young student at the Winchesterfield-Downsfordvale Academy for Proper Young Ladies.  "Alice-Miranda At School" is the first book in the series and was published in 2010.  The series was created by Australian author Jacqueline Harvey, a teacher and former Deputy Head of Junior School and Director of Development at Abbotsleigh.  Harvey created the Alice-Miranda series based on her teaching experiences at boarding schools.  The series is sold throughout Australia, United States, United Kingdom, Indonesia, Turkey, Hungary and Brazil.

Marvel Super Hero Squad (comics): Marvel Super Hero Squad is a comic book series based on "The Super Hero Squad Show".  The series lasted for 4 issues then ended.  Instead Marvel Comics started a monthly comic book series called Super Hero Squad, according to Marvel.com.

Kevin O'Brien (Wicklow footballer): Kevin O'Brien (Irish: Caoimhín Ó Briain) is a former Gaelic footballer from Baltinglass, County Wicklow.  O'Brien was part of the great Baltinglass team that dominated Wicklow football in the 80's and 90's, winning an All-Ireland Senior Club Football Championship Title in 1990.  He is also the only Wicklow recipient of an All Star having won one in 1990 at Full Forward.  He won a Railway Cup medal with Leinster in 1986, before he had even played for his county and added a second in 1990.  He also represented the Irish International Rules team in 1990 in the success over Australia and again in the 1998 Series.  He was also part of the Wicklow team that won the All-Ireland Junior Football Championship Title in 2002.  He was inducted in the GAA's Hall of Fame in 2010 and is one of the youngest recipients of the accolade.  He received his award at the 2010 Leinster final.

Mark Ralph: Mark Ralph (born 10 February 1980 in Paisley) is a field hockey midfield player from Scotland.  Ralph earned his first cap for the Men's National Team in 2011 against India, and went on to win 154 caps for Scotland and 24 caps for Great Britain.  He scored 74 goals Scotland and 1 goal for GB.  Ralph scored many of his goals due to a trademark drag flick.  Ralph played his club hockey for Kelburne HC before moving to the Netherlands with powerful Dutch side Hockey Club Klein Zwitzerland, based in The Hague.  On his return to Scotland he became the Player Coach of Kelburne HC for 5 seasons and helped the club achieve 11 National League titles in a row and compete with European clubs at the EHL, making the KO16 at his first attempt at coaching at this level.

The Black Stiletto: The Black Stiletto is a thriller novel written by Raymond Benson; it was published in the US in September 2011.  The first book in a series, it is the story of Judy Cooper, a young woman in late 1950s New York City, who becomes a masked vigilante.  A parallel storyline in the present involves Judy as an elderly Alzheimer's patient being cared for by her grown son, Martin Talbot, who learns of Judy's secret through a series of diaries and ephemera that she kept hidden and in trust for him should she become incapacitated.  Book series was optioned by Lonetree Entertainment in 2012.  On October 14, 2015, it was announced that Mila Kunis will be executive producing a television series based on the book series for ABC Studios.

List of Harry Potter cast members: Several actors of the United Kingdom and Ireland have voiced or portrayed characters appearing in the "Harry Potter" film series based on the book series by J. K. Rowling.  Daniel Radcliffe, Rupert Grint and Emma Watson have played Harry Potter, Ron Weasley and Hermione Granger in all the films.  When they were cast only Radcliffe had previously acted in a film.  Complementing them on screen are such actors as Helena Bonham Carter, Jim Broadbent, John Cleese, Robbie Coltrane, Warwick Davis, Ralph Fiennes, Michael Gambon, Brendan Gleeson, Richard Griffiths, Richard Harris, John Hurt, Jason Isaacs, Miriam Margolyes, Helen McCrory, Gary Oldman, Alan Rickman, Fiona Shaw, Maggie Smith, Timothy Spall, Imelda Staunton, David Thewlis, Emma Thompson, and Julie Walters, among others.  Thirteen actors have appeared as the same character in all eight films of the series.

Animorphs (TV series): Animorphs (also known under the promotional title AniTV) is a television adaptation made by Protocol Entertainment of the Scholastic book series of the same name by K. A. Applegate.  It was made for YTV for Season 1 and Global for season 2 in Canada and Nickelodeon for the United States.  The series was broadcast from September 1998 to March 2000 in the United States and Canada, and in May 2013, reruns began airing on Qubo.

Christopher Ralph: Christopher Ralph (born May 13, 1977) is a Canadian actor.  He is perhaps best known for his role as Tobias in the 1998 TV series "Animorphs".

Supporting paragraphs: Christopher Ralph Animorphs (TV series)
Answer: K. A. Applegate