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J.K. Rowling has written her detective novel, "The Silkworm", under the pen name Robert Galbraith Image Credit: AFP

J.K. Rowling’s latest novel has quickly climbed up the bestseller lists now that it’s finally available for purchase on Amazon.com

Rowling’s detective novel The Silkworm was in the top 100 by late Thursday for both print and e-book sales. She wrote it under the pen name Robert Galbraith.

Thursday was the book’s official publication date, but it couldn’t be ordered before then through Amazon because the online retailer and Rowling’s American publisher, Hachette Book Group, are arguing over e-book terms. Amazon delayed shipments for some books by Hachette authors or made the releases entirely unavailable.

Buying The Silkworm in hardcover still isn’t without some frustration: Customers were told delivery would likely take 2-4 weeks.

Barnes & Noble’s website ranks The Silkworm No 1 for print and No 5 for e-books.