Thomas Harris Block (born 11 February 1945, New York) has written a number of aviation-oriented novels, many which have gone on to acquire best-seller status in numerous countries. His novel writing began with the publication of "Mayday" in 1979. That novel was rewritten with his boyhood friend, novelist Nelson DeMille in 1998 and remains on DeMille's extensive backlist. "Mayday" became a CBS Movie of the Week in October, 2005.

Several of the other novels by Block include "Orbit" (a top bestseller in Germany, among other nations), "Airship Nine", "Forced Landing" (also done as a radio serialization drama in Japan), "Skyfall", "Open Skies" and "Captain". Thomas Block is still writing both fiction and non-fiction, and has edited and updated his earlier novels into ebooks in all the major formats and also into new full-sized (trade soft cover) printed versions.