A book by me?

I woke up this morning very early with the details to the beginning of a book.  I couldn't get them out of my mind and instead they kept coming to me with greater detail.  I decided to sit down at the computer and write them out.  It was amazing to me how easily the words and storyline flew from my fingers.  Before I knew it I had typed a 12 page first chapter.  I am very excited about it as it is the first time Ive had more of a storyline in my head than a short story.  This one could be my first book!  It felt very natural and best of all I had so much fun writing it!  Yay!