Cambridge, MA: Published by Houghton Mifflin/Sentry, 1962. Sentry Edition. soft cover. 8vo (21 x 13 cm). 443 pp. Pictorial covers (Sentry) with yellow/white titles to upper and spine. Text block tight and unmarked. 1962 Sentry (see photo of back cover for explanation) soft cover binding by Houghton Mifflin in remarkable..... More about The Armada