Question: Anna Banks is an American author, best known for her New York Times best selling "Syrena Legacy" series, Mad Hatter Entertainment, producer on the "How to Train Your Dragon" franchise, has acquired movie rights to her series, How to Train Your Dragon is a series of how many children's books written by British author Cressida Cowell?
Context: Fern Michaels (born Mary Ruth Kuczkir; April 9, 1933) is an American author of romance and thriller novels, including nearly 150 best selling books with nearly 200 million copies in print.  Her United States Today and New York Times best selling books include "Family Blessings", "Pretty Woman", and "Crown Jewel", as well as the Texas quartet and the Captive series. How to Train Your Dragon 2 is a 2014 American 3D computer-animated fantasy action film produced by DreamWorks Animation and distributed by 20th Century Fox, loosely based on the British book series of the same name by Cressida Cowell.  It is the sequel to the 2010 computer-animated film "How to Train Your Dragon" and the second in the trilogy.  The film is written and directed by Dean DeBlois, and stars the voices of Jay Baruchel, Gerard Butler, Craig Ferguson, America Ferrera, Jonah Hill, Christopher Mintz-Plasse, T.J. Miller, and Kristen Wiig, with the addition of Cate Blanchett, Djimon Hounsou, and Kit Harington.  The film takes place five years after the first film, featuring Hiccup and his friends as young adults as they meet Valka, Hiccup's long-lost mother, and Drago Bludvist, a madman who wants to conquer the world. Renee Raudman (born October 29) is an actress and voice actress who performed the English voice of Nastasha Romanenko in the video game "Metal Gear Solid" (under the pseudonym of Renne Collette) and its (using her real name).  She also provides the voice of the recurring character Ms. Butterbean on the cartoon series "The Grim Adventures of Billy and Mandy".  Outside of voiceover, Renee has recorded over 30 audiobook narrations, including as a co-reader on "Dark of Night" written by Suzanne Brockmann ("New York Times" best selling author of "Into the Fire") and 13 books written by New York Times best selling author Ilona Andrews. Cressida Cowell (born 15 April 1966) is an English children's author, popularly known for the novel series, "How to Train Your Dragon", which has subsequently become an award-winning franchise as adapted for the screen by DreamWorks Animation.  As of 2015, the series has sold more than seven million copies around the world. Fancy Nancy is a 2005 children's picture book written by Jane O'Connor and illustrated by Robin Preiss Glasser.  The book spent nearly 100 weeks on the New York Times Best Seller list, launching a series that now numbers upwards of 80 books, selling 30 million volumes.  "Fancy Nancy" has been on Publishers Weekly's bestseller list for picture books, was a Children's Book-of-the-Month Club selection and a Junior Library Guild Selection.  It also won a "Borders 2006 Original Voices" award and has been translated into 20 languages, including Hungarian and Hebrew.  In April 2012, Nancy was featured in her first chapter book, "Nancy Clancy: Super Sleuth".  Books in the "Fancy Nancy" series have now spent 330 weeks on the New York Times Best Seller list, and in the fall of 2012, "Fancy Nancy the Musical" was produced by Vital Theatre Company in New York City. How to Train Your Dragon franchise (also referred to as simply HTTYD) from DreamWorks Animation consists of two feature films "How to Train Your Dragon" (2010) and "How to Train Your Dragon 2" (2014), with a third and final planned for a 2019 release.  The franchise is loosely based on the British book series by Cressida Cowell.  The franchise also consists of four short films: "Legend of the Boneknapper Dragon" (2010), "Book of Dragons" (2011), "Gift of the Night Fury" (2011) and "Dawn of the Dragon Racers" (2014).  A television series following the events of the first film, "", began airing on Cartoon Network in September 2012.  Its second season was renamed "Dragons: Defenders of Berk".  Set several years later, and as a more immediate prequel to the second film, a new television series, titled "Dragons: Race to the Edge", aired on Netflix in June 2015.  The second season of the show was added to Netflix in January 2016 and a third season in June 2016.  A fourth season aired on Netflix in February 2017 and a fifth season in August 2017. Anna Banks is an American author, best known for her New York Times best selling "Syrena Legacy" series.  She currently lives with her husband and her daughter in Crestview, Florida.  Mad Hatter Entertainment, producer on the "How to Train Your Dragon" franchise, has acquired movie rights to her "Syrena Legacy" series. How to Train Your Dragon is a series of twelve children's books written by British author Cressida Cowell.  The books are set in a fictional Viking world and focus on the experiences of protagonist Hiccup as he overcomes great obstacles on his journey of Becoming a Hero the Hard Way.  The books were published by Hodder Children's Books in the UK and by Little, Brown and Company in the US.  The first book was published in 2003 and the last one in 2015.  As of 2015, the series has sold more than seven million copies around the world. Mad Hatter Entertainment is a literary management and TV and film production company based in Los Angeles, California.  Founded in 2004 by Michael Connolly, Mad Hatter Entertainment is best known for co-producing the How to Train Your Dragon franchise along with the Netflix series Hemlock Grove. Happy Wives Club: One Woman's Worldwide Search For The Secrets Of A Great Marriage is a New York Times and USA Today Best Selling book written by American author Fawn Weaver.  Released on January 7, 2014, Happy Wives Club debuted on the New York Times Nonfiction Paperback list at #3 in the January 26 edition of the New York Times Best Sellers List.  Happy Wives Club chronicles the author’s journey through 12 countries and 6 continents in search of the universal secret to a happy marriage.
Answer: twelve