Written jointly by all seven Mercury astronauts (John Glenn, Scott Carpenter, Gordon Cooper, Gus Grissom, Wally Schirra, Alan Shepard, and Deke Slayton), this volume traces the full arc of Project Mercury from the 1959 selection process to the orbital flights of 1962. Each astronaut authors his own chapters, recounting in the first person the training regimen, technical aspects of the capsule, and the missions in which he took part. An introduction by editor John Dille (Life Magazine) provides context and interleaves editorial notes within the flight narratives. The French translation, published in 1963 by Hachette, faithfully conveys the direct, personal style of the American original.