Jk Rowling 's huge selling Harry Potter novels went on-sale for the first time in Ebook edition on Tuesday (March 27, 2012), marking what industry figures are describing as digital publishing's "Beatles moment" - referring to the point in which the Fab Four's music finally became available online, reports the Guardian newspaper.

Initially scheduled to launch last October, the Ebooks finally went on-sale on Rowling's Pottermore website today, with the first three novels costing 4.99 (GBP) and the final four costing 6.99 (GBP). All seven books can be purchased in a bundle for 38.64 (GBP), a considerable saving on the cover price. As with other Ebooks, all the Potter series are compatible with devices such as Sony's Reader, the Barnes & Noble Nook, Google's Play and, of course, Amazon's Kindle. In a statement, Pottermore chief executive Charlie Redmayne said, "Today is a great day for Harry Potter fans and ebook readers alike. Not only is this phenomenally popular series available in ebook form for the first time, but across an extensive range of devices and platforms, thanks to unique collaborations with leading online retailers". Potter fans have been awaiting the Ebook release for some time, and Philip Jones, deputy editor of The Bookseller said, "This is digital publishing's Beatles' moment.These will be huge - they are a game changer because of the power of the Potter brand".

Print versions of the Harry Potter novels made around 4 million (GBP) last year alone, with the series selling over 450 million copies worldwide in total. Last month, JK Rowling announced she had signed a deal to write a new book for adults.