One interesting theory on the cause of manic depression or bipolar disorder is that there is a super-fast biological clock located in the hypothalamus, in the center of the brain, which is actually a tiny cluster of nerves called the supra chiasmatic nucleus or SCN.
Since the release of the first novel, Harry Potter and the Philosopher's Stone, on 26 June 1997, the books have found immense popularity, critical acclaim and commercial success worldwide.
The first illustrated book, a revamp of Harry Potter and the Sorcerer's Stone, is slated to go on sale Oct. 6, the Telegraph reports. The books are the first fully illustrated renditions of the Harry Potter series ever created.