 Hes long been laboring to complete a promised biography of William Shakespeare, but now Boris Johnson is turning to a life story closer to home: his own.Britains former prime minister is set to write a memoir like no other, according to Arabella Pike, publishing director at HarperCollins imprint William Collins, which has acquired the rights.I look forward to working with Boris Johnson as he writes his account of his time in office during some of the most momentous events the United Kingdom... 