The 2017 Martha’s Vineyard Book Festival was a three-day celebration of the written word, from journalism to cookbooks, novels to non-fiction books tackling a wide range of subjects. The event began Friday with a panel discussion about covering the White House, and then on Saturday authors gathered for discussions at the Harbor View Hotel in Edgartown. On Sunday the action continued at the Chilmark Community Center grounds, beginning with a press panel about politics and continuing to more than 30 speaking events, with authors and readers gathered together under tents on a sunny summer day.