'William & Catherine: Their Story' Penned by Author of Princess Diana Biography

May 16, 2011 — -- It was the wedding of a lifetime, watched by as many as 3 billion people across the globe.

Biographer Andrew Morton wrote a book about the life of the late Princess Diana, and now, he's written the story of her elder son's relationship with Kate Middleton.

In "William & Catherine: Their Story," Morton delves into history of the newest royal couple's relationship -- from how they met, their highs and lows, their engagement and the fairy tale nuptials on April 29.

The book was published just three days after the couple were wed.

Read the excerpt below, and then head to the "GMA" Library to find more good reads.

It was a day to cherish. A day to look back on with fondness and with pride. Amid the heart-stopping spectacle and the pomp and circumstance, it was very much a family occasion. While the 1,900-strong congregation of royals, diplomats, friends and celebrities absorbed the spine-tingling moment when Catherine Middleton appeared at the West Door of Westminster Abbey, her mother Carole just about managed to stem the tear poised to roll down her right cheek. 'You're so beautiful,' whispered William the moment he first saw his bride after her long slowwalk down the aisle on the arm of her father Michael. Crowned with a kiss on the balcony at Buckingham Palace – 'Oh wow,' said the new bride when she saw the sea of people on the Mall cheering and waving flags – it was the newly minted Duchess of Cambridge who was the undoubted star of the show. She had woken up a commoner in a bedroom at the Goring Hotel, and went to sleep – after an evening of revelry – a duchess, in a suite at Buckingham Palace.

On a day of bright-eyed tears, laughter and happy faces, the memory of the late Diana, Princess of Wales was in the minds and hearts of many. As one woman spectator remarked, 'When the sun came out just as Kate reached the altar we knew it was Diana.' True or not, the wedding marked a new chapter not only in the lives of William and Catherine but of the royal family, the hour-long marriage ceremony not just the union of two young people, but a renewal of the historic compact between the nation and the monarchy. The memories of the September day in 1997 when William and Harry walked solemnly behind their mother's funeral cortège were now overlaid by the sight of the smiling young Prince, hand in hand with his enchanting bride, returning along that same route in the 1902 State Landau to Buckingham Palace, ready to begin a new life together.

The relaxed, almost low-key approach to the big day – watched by an estimated television audience of 2.4 billion – was exemplified the night before when William decided at the last minute to go on a short walkabout, meeting and greeting well wishers camped outside Clarence House. Catherine was awake early. She hid her nerves beneath jokey banter, instructing herhairdresser Richard Ward that his only job was to ensure that her auburn locks were styled in such a way that 'by the time she got to the altar William must be able to recognize her'. Meanwhile her brother James had travelled the short distance to Clarence House for breakfast with his future brothers-in-law before they dressed in their military uniforms, Harry as a captain of the Blues and Royals, his regiment, and William in the striking scarlet uniform of the Colonel of the Irish Guards, a position to which he had been appointed in February.

She had other wedding gifts to bestow, showering the Prince and his bride-to-be with a confetti of titles. Before William left Clarence House with his best man, he had become His Royal Highness the Duke of Cambridge, Earl of Strathearn and Baron Carrickfergus. Plain Catherine was on her way to becoming Her Royal Highness the Duchess of Cambridge. Meanwhile her mother, who was the first member of the Middleton family to leave for Westminster Abbey, showed where her daughter gained her poised fashion sense, looking sophisticated and stylish in a sky-blue crêpe coatdress and day dress by Diana's favourite designer, Catherine Walker. With a nod to her local roots her matching hat was by Berkshire-based Jane Corbett.