With book sales in excess of 600 million and rising, Joanne Rowling is the seventh best-selling writer in history - under her pen names of J.K. Rowling and Robert Galbraith.
Her Harry Potter books were a publishing phenomenon, before becoming a huge hit at the cinema box office with eight films starring Daniel Radcliffe, Emma Watson and Rupert Grint.
The Edinburgh-based writer then switched pseudonyms and genres, authoring the crime drama novels featuring private detective Cormoran Strike - now an ongoing award-winning BBC television series.
Millions of avid readers have had their say on her library of work on book website Goodreads.
Here are their top 10.
5. Harry Potter and the Half-Blood Prince
The sixth of J.K. Rowling's Harry Potter books, Harry Potter and the Half-Blood Prince, was published in 2005. It completes the top five, with an average rating of 4.58 from 3,321,021 reviews. "When Dumbledore arrives at Privet Drive one summer night to collect Harry Potter, his wand hand is blackened and shrivelled, but he does not reveal why. Secrets and suspicion are spreading through the wizarding world, and Hogwarts itself is not safe. Harry is convinced that Malfoy bears the Dark Mark: there is a Death Eater amongst them. Harry will need powerful magic and true friends as he explores Voldemort's darkest secrets, and Dumbledore prepares him to face his destiny." | Contributed
6. Harry Potter and the Order of the Phoenix
Next up, in sixth spot, is Harry Potter and the Order of the Phoenix. The fifth book in the series, published in 2003, it scores an average reader rating of 4.50 from as total 3,430,681 reviews. "Dark times have come to Hogwarts. After the Dementors' attack on his cousin Dudley, Harry Potter knows that Voldemort will stop at nothing to find him. There are many who deny the Dark Lord's return, but Harry is not alone: a secret order gathers at Grimmauld Place to fight against the Dark forces. Harry must allow Professor Snape to teach him how to protect himself from Voldemort's savage assaults on his mind. But they are growing stronger by the day and Harry is running out of time." | Contributed
7. Harry Potter and the Sorcerer’s Stone
The book that started it all takes seventh place - Harry Potter and the Philosopher's Stone (or the Sorcerer’s Stone if you are an American Potter fan). Published in 1997, it scores an average rating of 4.47 from 10,210,890 reviews. "Harry Potter has never even heard of Hogwarts when the letters start dropping on the doormat at number four, Privet Drive. Addressed in green ink on yellowish parchment with a purple seal, they are swiftly confiscated by his grisly aunt and uncle. Then, on Harry's eleventh birthday, a great beetle-eyed giant of a man called Rubeus Hagrid bursts in with some astonishing news: Harry Potter is a wizard, and he has a place at Hogwarts School of Witchcraft and Wizardry. An incredible adventure is about to begin!" | Contributed
8. Harry Potter and the Chamber of Secrets
Completing a near clean sweep for Harry Potter in the best J.K. Rowling books is 1998's Harry Potter and the Chamber of Secrets. The second in the Harry Potter series scored an average rating of 4.43 from 3,993,016 reviews. "Harry Potter’s summer has included the worst birthday ever, doomy warnings from a house-elf called Dobby and rescue from the Dursleys by his friend Ron Weasley in a magical flying car! Back at Hogwarts School of Witchcraft and Wizardry for his second year, Harry hears strange whispers echo through empty corridors – and then the attacks start. Students are found as though turned to stone…Dobby’s sinister predictions seem to be coming true." | Contributed