Question: How many novels did Cecelia Ahern write before "Where Rainbows End," a book made adapted into the movie "Love, Rosie?"

Context paragraphs:
PS, I Scored the Bridesmaids: PS, I Scored The Bridesmaids is a 2005 novel by Irish journalist and author Paul Howard, and the fourth in the Ross O'Carroll-Kelly series.  The title refers to the novel "PS, I Love You" by Cecelia Ahern.

PS, I Love You (novel): PS, I Love You is Irish writer Cecelia Ahern's first novel, published in 2004.  The book reached No. 1 best-seller status in Ireland (for 19 weeks), Britain, the United States, Germany, and the Netherlands.

Mrs. Whippy: Mrs Whippy is a novella By Cecelia Ahern.  It is the story of Emelda, a middle-aged housewife and mother.  Her husband Charlie Holt (Mr Whippy) has left her for a younger woman (a 23-year-old dancer) and she is struggling to bring up her children.  The book was written for charity and details Emelda's struggle to regain her self-esteem and get on with her life.

A Place Called Here: A Place Called Here is Irish writer Cecelia Ahern's fourth novel, published in 2006.  The book was entitled "There's No Place Like Here" in the United States.

Cecelia Ahern: Cecelia Ahern (born 30 September 1981) is an Irish novelist whose work was first published in 2004.  Ahern was born and grew up in Dublin.  She is now published in nearly fifty countries, and has sold over 25 million copies of her novels worldwide.  Two of her books have been adapted as films and she has created several TV series.

Where Rainbows End: Where Rainbows End (in the US known as Love, Rosie or Rosie Dunne) is Irish writer Cecelia Ahern's second novel, published in 2004.  The entire novel is written in epistolary structure in the form of letters, emails, instant messages, and newspaper articles.  The book reached number 1 in Ireland and the UK, and was a best seller internationally.  The book won the German CORINE Award in 2005.  The novel was adapted into a film.

Thanks for the Memories (novel): Thanks for the Memories is a 2008 novel by Cecelia Ahern.

Samantha Who?: Samantha Who?  is an American television sitcom that originally aired on ABC from October 15, 2007 to July 23, 2009.  The series was created by Cecelia Ahern and Don Todd, who also served as producers.  Although highly rated during its first season, the sitcom lost momentum and viewers throughout its second season, and ABC canceled the show in May 2009.

Love, Rosie (film): Love, Rosie is a 2014 British-German romantic comedy-drama film directed by and written by Juliette Towhidi, based on the 2004 novel "Where Rainbows End" by Irish author Cecelia Ahern.  The film stars Lily Collins, Sam Claflin, Tamsin Egerton, Suki Waterhouse, Jaime Winstone and Lily Laight.

P.S. I Love You (film): P.S. I Love You is a 2007 American drama film directed by Richard LaGravenese.  The screenplay by LaGravenese and Steven Rogers is based on the 2004 novel of the same name by Cecelia Ahern.  It stars Hilary Swank, Gerard Butler, Lisa Kudrow, Gina Gershon, James Marsters, Harry Connick Jr. and Jeffrey Dean Morgan.  It was distributed by Warner Bros.  Pictures and Momentum Pictures.

Supporting paragraphs: Love, Rosie (film) Where Rainbows End
Answer: 1