Is this comming out now because another person with the name "Hunt" (hunter) is running as a republican contender for president?
It's because E. Howard Hunt died yesterday.
Probably not. Gerald Ford is dead and and his reputation safe now, and that may have had something to do with the timing. But Hunt's book is scheduled for release shortly, per linked story above:
But in a new memoir, "American Spy: My Secret History in the CIA, Watergate & Beyond," due out in April, Hunt, 88, writes: "Having Kennedy liquidated, thus elevating himself to the presidency without having to work for it himself, could have been a very tempting and logical move on Johnson's part.