As one of the world’s most popular literature pieces, Harry Potter brand is worth 25 billion US dollars. [Photo/VCG]

Proclaimed "the ultimate gift for Harry Potter fans," two new "History of Magic" books are to be published by Bloomsbury, Harry Potter books’ British launcher, this fall.

The two latest books are written by the British Library's "curatorial team,” according to the library shop's website.

It’s been 20 years since Harry Potter and the Philosopher’s Stone, the first book of Harry’s adventure, was published.

The two editions will be released as part of an exhibition at the British Library on October 20 to mark the celebration of the 20th anniversary.

The two books could probably make it to required texts in magical world, as 256-page “Harry Potter – A History of Magic” promises to trace J.K.Rowling’s magical inventions alongside their cultural and historical forebears in a mixed background of muggle world and wizarding world.

Harry Potter fans [Photo/VCG]

The book will feature with manuscripts, sketches and illustrations, which would bring Potter fans vivid immersive experience learning a fascinating history like Harry, Ron and Hermione did in Hogwarts.

The other book, “Harry Potter – A Journey Through the History of Magic,” pledges to be “packed with unseen sketches and manuscript pages from J.K.Rowling” and will unveil Hogwarts curriculum.

Ms. Rowling’s fan-targeted website “Pottermore” called the first one an “adult edition” and its companion book “a family edition" for younger readers.

As one of the world’s most popular literature pieces, Harry Potter brand is worth 25 billion US dollars, according to Money.com under Time Magazine.

The movie netted 7.7 billion US dollars worldwide and the books made just as much.

J.K.Rowling has been named the world's richest author, with a net worth of 1 billion US dollars, the financial magazine added.

J.K.Rowling [Photo/VCG]