JK Rowling net worth keeps soaring thanks to broadway, merchandise

JK Rowling Net Worth: $1B

Easily the most successful author in history — from a financial standpoint, at least — J.K. Rowling is the author of the "Harry Potter" series. In addition to the "Harry Potter" books, Rowling has written a number of related one-offs, published crime novels under the pseudonym Robert Galbraith and written the screenplay for the movie, "Fantastic Beasts and Where to Find Them."

'Harry Potter' Books

If you have first-edition or classics, you might be able to fetch some cash for those collectible books. Hardcover first editions of "Harry Potter and the Philosopher's Stone" can fetch up to $45,000 and "Harry Potter and the Chamber of Secrets" can go for around $7,000, according to Sotheby's. A first edition of F. Scott Fitzgerald's classic, "The Great Gatsby," however, could sell for as much as $400,000 — as long as it's in a perfect dust jacket.

Books can be highly valuable depending on a number of reasons and factors that include rarity and binding quality, according to auction company Sotheby’s. Before you trash or decide to rebind your books, do your research — you just might have a gem in your hand. 

RELATED: Check out 2017's richest women in the world: 

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10 richest women in the world of 2017
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10 richest women in the world of 2017

Former No. 1. Liliane Bettencourt

Net worth: $39.3B

Origin of wealth: L'Oreal

Via Forbes

Current No.1 Alice Walton

Net worth: $34.3B

Origin of wealth: Wal-Mart

Via Forbes

2. Jacqueline Mars

Net worth: $27.2B

Origin of wealth: Candy

Via Forbes

3. Maria Franca Fissolo

Net worth: $25.3B

Origin of wealth: Nutella, chocolates

Via Forbes

4. Susanne Klatten

Net worth: $20.5B

Origin of wealth: BMW, pharmaceuticals

Via Forbes

5. Laurene Powell Jobs

Net worth: $20.2B

Origin of wealth: Apple, Disney

Via Forbes

6. Gina Rinehart

Net worth: $14.5B

Origin of wealth: Mining

Via Forbes

7. Abigail Johnson

Net worth: $14.4B

Origin of wealth: Money management

Via Forbes

8. Iris Fontbona

Net worth: $13.1B

Origin of wealth: Mining

Via Forbes

9. Charlene de Carvalho-Heineken

Net worth: $12.7B

Origin of wealth: Heineken

Via Forbes

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'Harry Potter' Movies

Emma Watson with Daniel Radcliffe and Rupert Grint at the Hand, Foot and Wand Print Ceremony Honoring The Cast of "Harry Potter". Grauman's Chinese Theater, Hollywood, CA. 07-09-07

'Fantastic Beasts' Movies

Photo by Moviestore/REX/Shutterstock
Katherine Waterston, Eddie Redmayne
'Fantastic Beasts and Where to Find Them' film - 2016

'Harry Potter' West End and Broadway Productions

LONDON, ENGLAND - DECEMBER 2016: Harry Potter and the Cursed Child, a play at the Palace Theatre, London

Merchandising

The Shambles, York 16th February 2018. J K Rowlings Harry Potter merchandise including a mug and hat in the Harry Potter platform nine and three quarters shop in the Shambles in Yorks, UK

The Wizarding World of Harry Potter at Universal Studios

  • $129 for the California Neighbor Pass. Save $20 off regular pass prices.

The best of both worlds collide for thrill seekers at Universal Studios Hollywood. Tour a real movie studio and enjoy park rides and shows. Harry Potter fans will not want to miss The Wizarding World of Harry Potter. Leave time for shopping, eating and taking in a flick at CityWalk, the entertainment promenade next to the theme park.

Read More: The Priciest Theme Park Tickets Around the Globe

Non-'Harry Potter' Books

Photo by Tony Kyriacou/REX/Shutterstock
'The Casual Vacancy' on the self at Foyles
'The Casual Vacancy' book by J.K.Rowling goes on sale at Foyles, St Pancras International, London, Britain - 27 Sep 2012

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