As of February 5, 2008, Paul had won sixteen delegates to the Republican National Convention, placing him last among the four Republican candidates still in the race at that time. The campaign projected on February 6 to have secured at least 42 delegates to the national convention. On March 4, 2008, John McCain earned enough pledged delegates to become the Republican presumptive nominee, but Paul decided to continue his run. Paul released "" on April 29, which collected essays based on thoughts that arose from his experiences running for president in 2008. The book went on to be a number 1 bestseller among political books on Amazon.com and "The New York Times" nonfiction list.