We now have a title for Book VII: Harry Potter and the Deathly Hallows.

Rowling's US publisher, Scholastic Inc, released a brief statement Thursday announcing the name of the world's most anticipated children's book, the finale to her phenomenally popular fantasy series.

No publication date or other details were offered. Rowling is still working on the book, she explained on her Web site in an entry posted early Thursday.

"I'm now writing scenes that have been planned, in some cases, for a dozen years or even more," she wrote. "I don't think anyone who has not been in a similar situation can possibly know how this feels: I am alternately elated and overwrought. I both want, and don't want, to finish this book (don't worry, I will.)" Rowling said she has been asked for years if she ever dreams she is in the boy wizard's world.

"The answer was 'no' until a few nights ago, when I had an epic dream in which I was, simultaneously, Harry and the narrator," she wrote. "Perhaps I should cut back on the caffeine?" she joked.

Rowling also said she saw a 20-minute preview of the fifth Harry Potter film, "Harry Potter and the Order of the Phoenix," which she said "looks fantastic."

The latest movie in the blockbuster series will be released in July. Meanwhile, she set up a test for her Potter fans if they want to find the title for themselves.

If you go to her click on the eraser and you will be taken to a room -- you'll see a window, a door and a mirror.

In the mirror, you'll see a hallway. Click on the farthest doorknob and look for the Christmas tree. They click on the center of the door next to the mirror and a wreath appears. Then click on the top of the mirror and you'll see a garland.

Look for a cobweb next to the door. Click on it, and it will disappear. Now, look at the chimes in the window.

Click on the second chime to the right, and hold it down. The chime will turn into the key, which opens the door. Click on the wrapped gift behind the door, then click on it again and figure out the title yourself by playing a game of hangman. Or you can just take Scholastic's word for it.

The Harry Potter books have sold more than 300 million copies and have been translated into 63 languages.