Much research began along with the beginning writings of the first book, which according to all accounts took them working 90-hour weeks for just over three months. Being so focused and driven to finish the first book, they worked right through any type of holiday that came along. All the while, unbeknownst to the editors, the McWhirter twins, this would be the birth of a book that would one day dominate all books as an all-time best seller and one regarded as a trusted and recognizable brand globally.
