This is one of many amazing book covers in NASA's Space Printed Works Artifact Gallery. This title was published in 1967. From NASA's description of the book:
Unique about the above archive is material little remembered about the history of rocketry and space travel. On pages 30 and 31 of the above children's book, the DYNA-SOAR project is discussed. According to the article which is paraphrased here, the Boeing Dyna-Soar was a follow-on to the X-15 program. The name came from the idea – "dynamic soaring." The booster for the man-carrying winged space glider was to be a military Titan ICBM ( Intercontinental Baslistic Missle ). After the initial test on the Titan, the high altitude orbital reconnaisance patrol bomber (a later advanced relative of Dyna-Soar) would be strapped to a mother plane, launched from beneath the wing and rocketed into orbit at 17,000 miles per hour.
