Into That Silent Sea: Trailblazers of the Space Era 1961–1965 is a 2007 non-fiction book by space historians Francis French and Colin Burgess. Drawing on a number of original personal interviews with astronauts, cosmonauts and those who worked closely with them, the book chronicles the American and Russian programs from 1961 onwards, from the first human spaceflight of Yuri Gagarin through the Mercury, Vostok and Voskhod flights, up to the first spacewalk by Alexei Leonov.