Katie Nicholl literally wrote the book on Prince William and Kate Middleton's romance, The Making of a Royal Romance: William, Kate, and Harry — a Look Behind the Palace Walls. We caught up with the London-based writer to get the inside scoop on what we can expect when the royal baby arrives next month, including what its first weeks will look like, how the public will find out about the birth, and why Will and Kate can expect that becoming parents will be "the hardest challenge of their lives."