HELIOsphere Announces Additional Guests of Honor HELIOsphere 2017 is pleased to announce the additional Guests of Honor, David Gerrold and Danielle Ackley-McPhail, who have graciously accepted our invitation to celebrate the inauguration of the New York area's newest Science Fiction and Fantasy Convention. David Gerrold David Gerrold sold his first script to Star Trek in 1967, while still a student at…